diff --git a/doc/source/microversion_testing.rst b/doc/source/microversion_testing.rst
index 572d425..adbd2dc 100644
--- a/doc/source/microversion_testing.rst
+++ b/doc/source/microversion_testing.rst
@@ -247,3 +247,9 @@
  * `2.42`_
 
  .. _2.42: http://docs.openstack.org/developer/nova/api_microversion_history.html#maximum-in-ocata
+
+* Volume
+
+ * `3.3`_
+
+ .. _3.3:  https://docs.openstack.org/developer/cinder/devref/api_microversion_history.html#id4
diff --git a/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml b/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml
new file mode 100644
index 0000000..0075a36
--- /dev/null
+++ b/releasenotes/notes/add-content-type-without-spaces-b2c9b91b257814f3.yaml
@@ -0,0 +1,9 @@
+---
+upgrade:
+  - The ``JSON_ENC`` and ``TXT_ENC`` option in the ``_error_checker``
+    section have been added with additional content-type which are
+    defined in RFC7231 but missing in the currnt rest_client.py file.
+    The lack of these additional content-type will cause defcore test
+    to fail for OpenStack public cloud which uses tomcat module in the
+    api gateway. The additions are ``application/json;charset=utf-8``,
+    ``text/html;charset=utf-8``,``text/plain;charset=utf-8``
\ No newline at end of file
diff --git a/releasenotes/notes/fix-volume-v2-service-clients-bugfix-1667354-73d2c3c8fedc08bf.yaml b/releasenotes/notes/fix-volume-v2-service-clients-bugfix-1667354-73d2c3c8fedc08bf.yaml
new file mode 100644
index 0000000..6d31576
--- /dev/null
+++ b/releasenotes/notes/fix-volume-v2-service-clients-bugfix-1667354-73d2c3c8fedc08bf.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fix below volume v2 service clients to make v2 API call: Bug#1667354
+
+    - SchedulerStatsClient
+    - CapabilitiesClient
diff --git a/releasenotes/notes/remove-sahara-service-available-44a642aa9c634ab4.yaml b/releasenotes/notes/remove-sahara-service-available-44a642aa9c634ab4.yaml
new file mode 100644
index 0000000..c0dc7d7
--- /dev/null
+++ b/releasenotes/notes/remove-sahara-service-available-44a642aa9c634ab4.yaml
@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    The 'sahara' config option in the 'service-available' group has been moved to the sahara plugin
+    (openstack/sahara-tests) along with tests and service client during the Ocata timeframe.
+    A 'sahara' config option was left over on Tempest side, and it's removed now.
+    As long as the sahara plugin is installed, this change as no impact on users of sahara tests.
diff --git a/tempest/api/image/admin/v2/test_images.py b/tempest/api/image/admin/v2/test_images.py
index 11b595a..fc5ed79 100644
--- a/tempest/api/image/admin/v2/test_images.py
+++ b/tempest/api/image/admin/v2/test_images.py
@@ -17,8 +17,8 @@
 import testtools
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 
diff --git a/tempest/api/image/base.py b/tempest/api/image/base.py
index cd4f820..69294fa 100644
--- a/tempest/api/image/base.py
+++ b/tempest/api/image/base.py
@@ -15,8 +15,8 @@
 import six
 
 from tempest.common import image as common_image
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 import tempest.test
 
diff --git a/tempest/api/image/v1/test_image_members_negative.py b/tempest/api/image/v1/test_image_members_negative.py
index d1aa801..f075cab 100644
--- a/tempest/api/image/v1/test_image_members_negative.py
+++ b/tempest/api/image/v1/test_image_members_negative.py
@@ -13,7 +13,7 @@
 #    under the License.
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/image/v1/test_images.py b/tempest/api/image/v1/test_images.py
index 756c78c..b341ab7 100644
--- a/tempest/api/image/v1/test_images.py
+++ b/tempest/api/image/v1/test_images.py
@@ -17,9 +17,9 @@
 
 from tempest.api.image import base
 from tempest.common import image as common_image
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions
 
diff --git a/tempest/api/image/v1/test_images_negative.py b/tempest/api/image/v1/test_images_negative.py
index abec82a..42ff02f 100644
--- a/tempest/api/image/v1/test_images_negative.py
+++ b/tempest/api/image/v1/test_images_negative.py
@@ -15,7 +15,7 @@
 
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/image/v2/test_images.py b/tempest/api/image/v2/test_images.py
index 2812c68..30f9ae2 100644
--- a/tempest/api/image/v2/test_images.py
+++ b/tempest/api/image/v2/test_images.py
@@ -20,8 +20,8 @@
 
 from oslo_log import log as logging
 from tempest.api.image import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/image/v2/test_images_metadefs_namespace_objects.py b/tempest/api/image/v2/test_images_metadefs_namespace_objects.py
index 38e56d4..80f8112 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespace_objects.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespace_objects.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 
diff --git a/tempest/api/image/v2/test_images_metadefs_namespace_properties.py b/tempest/api/image/v2/test_images_metadefs_namespace_properties.py
index ead70f2..ed91726 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespace_properties.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespace_properties.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/image/v2/test_images_metadefs_namespace_tags.py b/tempest/api/image/v2/test_images_metadefs_namespace_tags.py
index 608d9fc..e2a3617 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespace_tags.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespace_tags.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 
diff --git a/tempest/api/image/v2/test_images_metadefs_namespaces.py b/tempest/api/image/v2/test_images_metadefs_namespaces.py
index 9fda937..f71b16c 100644
--- a/tempest/api/image/v2/test_images_metadefs_namespaces.py
+++ b/tempest/api/image/v2/test_images_metadefs_namespaces.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
diff --git a/tempest/api/image/v2/test_images_tags.py b/tempest/api/image/v2/test_images_tags.py
index fd9591f..601826e 100644
--- a/tempest/api/image/v2/test_images_tags.py
+++ b/tempest/api/image/v2/test_images_tags.py
@@ -13,7 +13,7 @@
 # under the License.
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/image/v2/test_images_tags_negative.py b/tempest/api/image/v2/test_images_tags_negative.py
index 2a08f3a..7032dd4 100644
--- a/tempest/api/image/v2/test_images_tags_negative.py
+++ b/tempest/api/image/v2/test_images_tags_negative.py
@@ -13,7 +13,7 @@
 # under the License.
 
 from tempest.api.image import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/base.py b/tempest/api/object_storage/base.py
index 642c1ac..e0216fd 100644
--- a/tempest/api/object_storage/base.py
+++ b/tempest/api/object_storage/base.py
@@ -16,8 +16,8 @@
 import time
 
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import exceptions as lib_exc
 import tempest.test
diff --git a/tempest/api/object_storage/test_account_quotas.py b/tempest/api/object_storage/test_account_quotas.py
index cbf0d4b..84e4508 100644
--- a/tempest/api/object_storage/test_account_quotas.py
+++ b/tempest/api/object_storage/test_account_quotas.py
@@ -13,8 +13,8 @@
 # under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_account_services.py b/tempest/api/object_storage/test_account_services.py
index cf7dbe8..de64dfe 100644
--- a/tempest/api/object_storage/test_account_services.py
+++ b/tempest/api/object_storage/test_account_services.py
@@ -20,8 +20,8 @@
 
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_container_acl.py b/tempest/api/object_storage/test_container_acl.py
index aa4e92c..d4e5ec5 100644
--- a/tempest/api/object_storage/test_container_acl.py
+++ b/tempest/api/object_storage/test_container_acl.py
@@ -14,8 +14,8 @@
 #    under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/object_storage/test_container_acl_negative.py b/tempest/api/object_storage/test_container_acl_negative.py
index d5d5ea7..c0f7b3a 100644
--- a/tempest/api/object_storage/test_container_acl_negative.py
+++ b/tempest/api/object_storage/test_container_acl_negative.py
@@ -13,8 +13,8 @@
 #    under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_container_quotas.py b/tempest/api/object_storage/test_container_quotas.py
index d3b456a..7ff337e 100644
--- a/tempest/api/object_storage/test_container_quotas.py
+++ b/tempest/api/object_storage/test_container_quotas.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_container_services.py b/tempest/api/object_storage/test_container_services.py
index 2e617f3..a82d2cc 100644
--- a/tempest/api/object_storage/test_container_services.py
+++ b/tempest/api/object_storage/test_container_services.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_container_services_negative.py b/tempest/api/object_storage/test_container_services_negative.py
index ebbb84e..be066ba 100644
--- a/tempest/api/object_storage/test_container_services_negative.py
+++ b/tempest/api/object_storage/test_container_services_negative.py
@@ -16,8 +16,8 @@
 import testtools
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions
 from tempest import test
diff --git a/tempest/api/object_storage/test_container_staticweb.py b/tempest/api/object_storage/test_container_staticweb.py
index a280248..9e01c26 100644
--- a/tempest/api/object_storage/test_container_staticweb.py
+++ b/tempest/api/object_storage/test_container_staticweb.py
@@ -14,7 +14,7 @@
 
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_container_sync.py b/tempest/api/object_storage/test_container_sync.py
index 63fb93d..1c45a98 100644
--- a/tempest/api/object_storage/test_container_sync.py
+++ b/tempest/api/object_storage/test_container_sync.py
@@ -18,10 +18,9 @@
 from six.moves.urllib import parse as urlparse
 import testtools
 
-
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_object_formpost.py b/tempest/api/object_storage/test_object_formpost.py
index 2829ac7..c100629 100644
--- a/tempest/api/object_storage/test_object_formpost.py
+++ b/tempest/api/object_storage/test_object_formpost.py
@@ -19,7 +19,7 @@
 from six.moves.urllib import parse as urlparse
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_object_formpost_negative.py b/tempest/api/object_storage/test_object_formpost_negative.py
index 52b3978..c4e6a3a 100644
--- a/tempest/api/object_storage/test_object_formpost_negative.py
+++ b/tempest/api/object_storage/test_object_formpost_negative.py
@@ -19,7 +19,7 @@
 from six.moves.urllib import parse as urlparse
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_object_services.py b/tempest/api/object_storage/test_object_services.py
index 58fd822..d463827 100644
--- a/tempest/api/object_storage/test_object_services.py
+++ b/tempest/api/object_storage/test_object_services.py
@@ -21,8 +21,8 @@
 
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_object_slo.py b/tempest/api/object_storage/test_object_slo.py
index 8ed9bf8..085ad13 100644
--- a/tempest/api/object_storage/test_object_slo.py
+++ b/tempest/api/object_storage/test_object_slo.py
@@ -18,7 +18,7 @@
 
 from tempest.api.object_storage import base
 from tempest.common import custom_matchers
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 from tempest import test
diff --git a/tempest/api/object_storage/test_object_temp_url.py b/tempest/api/object_storage/test_object_temp_url.py
index 5e3c9f7..912deab 100644
--- a/tempest/api/object_storage/test_object_temp_url.py
+++ b/tempest/api/object_storage/test_object_temp_url.py
@@ -19,7 +19,7 @@
 from six.moves.urllib import parse as urlparse
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/object_storage/test_object_temp_url_negative.py b/tempest/api/object_storage/test_object_temp_url_negative.py
index d0e0935..9c1393f 100644
--- a/tempest/api/object_storage/test_object_temp_url_negative.py
+++ b/tempest/api/object_storage/test_object_temp_url_negative.py
@@ -19,7 +19,7 @@
 from six.moves.urllib import parse as urlparse
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/object_storage/test_object_version.py b/tempest/api/object_storage/test_object_version.py
index 1b12dac..dc0d179 100644
--- a/tempest/api/object_storage/test_object_version.py
+++ b/tempest/api/object_storage/test_object_version.py
@@ -16,8 +16,8 @@
 import testtools
 
 from tempest.api.object_storage import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/orchestration/base.py b/tempest/api/orchestration/base.py
index 3701b55..4e17c3d 100644
--- a/tempest/api/orchestration/base.py
+++ b/tempest/api/orchestration/base.py
@@ -14,8 +14,8 @@
 
 import yaml
 
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 import tempest.test
 
diff --git a/tempest/api/orchestration/stacks/test_environment.py b/tempest/api/orchestration/stacks/test_environment.py
index 0a9b3e5..c8a9aa7 100644
--- a/tempest/api/orchestration/stacks/test_environment.py
+++ b/tempest/api/orchestration/stacks/test_environment.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/orchestration/stacks/test_limits.py b/tempest/api/orchestration/stacks/test_limits.py
index b079435..9c9d4f9 100644
--- a/tempest/api/orchestration/stacks/test_limits.py
+++ b/tempest/api/orchestration/stacks/test_limits.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 
diff --git a/tempest/api/orchestration/stacks/test_neutron_resources.py b/tempest/api/orchestration/stacks/test_neutron_resources.py
index 0154658..6faca71 100644
--- a/tempest/api/orchestration/stacks/test_neutron_resources.py
+++ b/tempest/api/orchestration/stacks/test_neutron_resources.py
@@ -14,8 +14,8 @@
 from oslo_log import log as logging
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions
 from tempest import test
diff --git a/tempest/api/orchestration/stacks/test_non_empty_stack.py b/tempest/api/orchestration/stacks/test_non_empty_stack.py
index f106349..6b9c88b 100644
--- a/tempest/api/orchestration/stacks/test_non_empty_stack.py
+++ b/tempest/api/orchestration/stacks/test_non_empty_stack.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/orchestration/stacks/test_nova_keypair_resources.py b/tempest/api/orchestration/stacks/test_nova_keypair_resources.py
index 4d1db6d..a51648f 100644
--- a/tempest/api/orchestration/stacks/test_nova_keypair_resources.py
+++ b/tempest/api/orchestration/stacks/test_nova_keypair_resources.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/orchestration/stacks/test_soft_conf.py b/tempest/api/orchestration/stacks/test_soft_conf.py
index 89b10cc..dae0bab 100644
--- a/tempest/api/orchestration/stacks/test_soft_conf.py
+++ b/tempest/api/orchestration/stacks/test_soft_conf.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/orchestration/stacks/test_stacks.py b/tempest/api/orchestration/stacks/test_stacks.py
index 7b5f161..0be135b 100644
--- a/tempest/api/orchestration/stacks/test_stacks.py
+++ b/tempest/api/orchestration/stacks/test_stacks.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/orchestration/stacks/test_swift_resources.py b/tempest/api/orchestration/stacks/test_swift_resources.py
index 505abe7..97fdac4 100644
--- a/tempest/api/orchestration/stacks/test_swift_resources.py
+++ b/tempest/api/orchestration/stacks/test_swift_resources.py
@@ -13,8 +13,8 @@
 # under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/orchestration/stacks/test_templates.py b/tempest/api/orchestration/stacks/test_templates.py
index 21548a0..4ff951d 100644
--- a/tempest/api/orchestration/stacks/test_templates.py
+++ b/tempest/api/orchestration/stacks/test_templates.py
@@ -11,7 +11,7 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/orchestration/stacks/test_volumes.py b/tempest/api/orchestration/stacks/test_volumes.py
index d34eb89..86323e1 100644
--- a/tempest/api/orchestration/stacks/test_volumes.py
+++ b/tempest/api/orchestration/stacks/test_volumes.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 from tempest.api.orchestration import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/volume/admin/test_multi_backend.py b/tempest/api/volume/admin/test_multi_backend.py
index c3e904a..4a46adc 100644
--- a/tempest/api/volume/admin/test_multi_backend.py
+++ b/tempest/api/volume/admin/test_multi_backend.py
@@ -12,9 +12,9 @@
 
 import six
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/volume/admin/test_qos.py b/tempest/api/volume/admin/test_qos.py
index e1cfb30..7a91985 100644
--- a/tempest/api/volume/admin/test_qos.py
+++ b/tempest/api/volume/admin/test_qos.py
@@ -13,8 +13,8 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils as utils
 from tempest.common import waiters
+from tempest.lib.common.utils import data_utils as utils
 from tempest.lib import decorators
 
 
diff --git a/tempest/api/volume/admin/test_volume_quotas.py b/tempest/api/volume/admin/test_volume_quotas.py
index 83fca45..3fd9b01 100644
--- a/tempest/api/volume/admin/test_volume_quotas.py
+++ b/tempest/api/volume/admin/test_volume_quotas.py
@@ -13,8 +13,8 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 QUOTA_KEYS = ['gigabytes', 'snapshots', 'volumes', 'backups']
diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index 5d08416..6e56be9 100644
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -14,9 +14,9 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py b/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
index 5f590bc..d491f23 100644
--- a/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
+++ b/tempest/api/volume/admin/test_volume_types_extra_specs_negative.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/volume/admin/test_volumes_backup.py b/tempest/api/volume/admin/test_volumes_backup.py
index 13b7384..b771d8a 100644
--- a/tempest/api/volume/admin/test_volumes_backup.py
+++ b/tempest/api/volume/admin/test_volumes_backup.py
@@ -17,9 +17,9 @@
 from oslo_serialization import jsonutils as json
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/volume/admin/v3/test_user_messages.py b/tempest/api/volume/admin/v3/test_user_messages.py
index ed85d4d..991397a 100755
--- a/tempest/api/volume/admin/v3/test_user_messages.py
+++ b/tempest/api/volume/admin/v3/test_user_messages.py
@@ -14,8 +14,8 @@
 #    under the License.
 
 from tempest.api.volume.v3 import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 
 CONF = config.CONF
diff --git a/tempest/api/volume/base.py b/tempest/api/volume/base.py
index fd10fb3..496594c 100644
--- a/tempest/api/volume/base.py
+++ b/tempest/api/volume/base.py
@@ -14,9 +14,9 @@
 #    under the License.
 
 from tempest.common import compute
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import exceptions
 import tempest.test
diff --git a/tempest/api/volume/test_volumes_actions.py b/tempest/api/volume/test_volumes_actions.py
index 0a6901c..d39b07a 100644
--- a/tempest/api/volume/test_volumes_actions.py
+++ b/tempest/api/volume/test_volumes_actions.py
@@ -14,9 +14,9 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions
diff --git a/tempest/api/volume/test_volumes_backup.py b/tempest/api/volume/test_volumes_backup.py
index e24a142..83006c0 100644
--- a/tempest/api/volume/test_volumes_backup.py
+++ b/tempest/api/volume/test_volumes_backup.py
@@ -16,9 +16,9 @@
 from testtools import matchers
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/volume/test_volumes_get.py b/tempest/api/volume/test_volumes_get.py
index a3e46a8..d870534 100644
--- a/tempest/api/volume/test_volumes_get.py
+++ b/tempest/api/volume/test_volumes_get.py
@@ -17,9 +17,9 @@
 from testtools import matchers
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest.common import waiters
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/volume/test_volumes_list.py b/tempest/api/volume/test_volumes_list.py
index d1da95d..1d6d35f 100644
--- a/tempest/api/volume/test_volumes_list.py
+++ b/tempest/api/volume/test_volumes_list.py
@@ -18,7 +18,7 @@
 from testtools import matchers
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/volume/test_volumes_negative.py b/tempest/api/volume/test_volumes_negative.py
index 28e65ed..76ffc03 100644
--- a/tempest/api/volume/test_volumes_negative.py
+++ b/tempest/api/volume/test_volumes_negative.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/volume/test_volumes_snapshots.py b/tempest/api/volume/test_volumes_snapshots.py
index 5abda5e..82b4fc2 100644
--- a/tempest/api/volume/test_volumes_snapshots.py
+++ b/tempest/api/volume/test_volumes_snapshots.py
@@ -13,8 +13,8 @@
 from testtools import matchers
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest import test
 
diff --git a/tempest/api/volume/test_volumes_snapshots_negative.py b/tempest/api/volume/test_volumes_snapshots_negative.py
index 9e44379..d3e3c9b 100644
--- a/tempest/api/volume/test_volumes_snapshots_negative.py
+++ b/tempest/api/volume/test_volumes_snapshots_negative.py
@@ -11,8 +11,8 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/api/volume/v2/test_volumes_snapshots_negative.py b/tempest/api/volume/v2/test_volumes_snapshots_negative.py
index e5581b9..4608b07 100644
--- a/tempest/api/volume/v2/test_volumes_snapshots_negative.py
+++ b/tempest/api/volume/v2/test_volumes_snapshots_negative.py
@@ -14,8 +14,8 @@
 #    under the License.
 
 from tempest.api.volume import base
-from tempest.common.utils import data_utils
 from tempest import config
+from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
 from tempest.lib import exceptions as lib_exc
 from tempest import test
diff --git a/tempest/common/validation_resources.py b/tempest/common/validation_resources.py
index 88697c4..b15796f 100644
--- a/tempest/common/validation_resources.py
+++ b/tempest/common/validation_resources.py
@@ -15,7 +15,7 @@
 
 from tempest import config
 
-from tempest.common.utils import data_utils
+from tempest.lib.common.utils import data_utils
 from tempest.lib import exceptions as lib_exc
 
 CONF = config.CONF
diff --git a/tempest/config.py b/tempest/config.py
index 67b957b..fb3b8f4 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -984,9 +984,6 @@
     cfg.BoolOpt('heat',
                 default=False,
                 help="Whether or not Heat is expected to be available"),
-    cfg.BoolOpt('sahara',
-                default=False,
-                help="Whether or not Sahara is expected to be available"),
 ]
 
 debug_group = cfg.OptGroup(name="debug",
@@ -1090,6 +1087,12 @@
         return getattr(_CONF, attr)
 
     def _set_attrs(self):
+        # This methods ensures that config options in Tempest as well as
+        # in Tempest plugins can be accessed via:
+        #     CONF.<normalised_group_name>.<key_name>
+        # where:
+        #     normalised_group_name = group_name.replace('-', '_')
+        # Attributes are set at __init__ time *only* for known option groups
         self.auth = _CONF.auth
         self.compute = _CONF.compute
         self.compute_feature_enabled = _CONF['compute-feature-enabled']
@@ -1111,6 +1114,23 @@
         self.service_available = _CONF.service_available
         self.debug = _CONF.debug
         logging.tempest_set_log_file('tempest.log')
+        # Setting attributes for plugins
+        # NOTE(andreaf) Plugins have no access to the TempestConfigPrivate
+        # instance at discovery time, so they have no way of setting these
+        # aliases themselves.
+        ext_plugins = plugins.TempestTestPluginManager()
+        for group, _ in ext_plugins.get_plugin_options_list():
+            if isinstance(group, cfg.OptGroup):
+                # If we have an OptGroup
+                group_name = group.name
+                group_dest = group.dest
+            else:
+                # If we have a group name as a string
+                group_name = group
+                group_dest = group.replace('-', '_')
+            # NOTE(andreaf) We can set the attribute safely here since in
+            # case of name conflict we would not have reached this point.
+            setattr(self, group_dest, _CONF[group_name])
 
     def __init__(self, parse_conf=True, config_path=None):
         """Initialize a configuration from a conf directory and conf file."""
diff --git a/tempest/hacking/ignored_list_T110.txt b/tempest/hacking/ignored_list_T110.txt
index be875ee..0e7e894 100644
--- a/tempest/hacking/ignored_list_T110.txt
+++ b/tempest/hacking/ignored_list_T110.txt
@@ -1,4 +1 @@
 ./tempest/services/object_storage/object_client.py
-./tempest/services/volume/base/base_qos_client.py
-./tempest/services/volume/base/base_backups_client.py
-./tempest/services/baremetal/base.py
diff --git a/tempest/hacking/ignored_list_T111.txt b/tempest/hacking/ignored_list_T111.txt
deleted file mode 100644
index 8017e76..0000000
--- a/tempest/hacking/ignored_list_T111.txt
+++ /dev/null
@@ -1 +0,0 @@
-./tempest/services/baremetal/base.py
diff --git a/tempest/lib/common/rest_client.py b/tempest/lib/common/rest_client.py
index 3246d6a..99ba6ab 100644
--- a/tempest/lib/common/rest_client.py
+++ b/tempest/lib/common/rest_client.py
@@ -732,12 +732,21 @@
         if resp.status < 400:
             return
 
-        JSON_ENC = ['application/json', 'application/json; charset=utf-8']
+        # NOTE(zhipengh): There is a purposefully duplicate of content-type
+        # with the only difference is with or without spaces, as specified
+        # in RFC7231.
+        JSON_ENC = ['application/json', 'application/json; charset=utf-8',
+                    'application/json;charset=utf-8']
+
         # NOTE(mtreinish): This is for compatibility with Glance and swift
         # APIs. These are the return content types that Glance api v1
         # (and occasionally swift) are using.
+        # NOTE(zhipengh): There is a purposefully duplicate of content-type
+        # with the only difference is with or without spaces, as specified
+        # in RFC7231.
         TXT_ENC = ['text/plain', 'text/html', 'text/html; charset=utf-8',
-                   'text/plain; charset=utf-8']
+                   'text/plain; charset=utf-8', 'text/html;charset=utf-8',
+                   'text/plain;charset=utf-8']
 
         if ctype.lower() in JSON_ENC:
             parse_resp = True
diff --git a/tempest/lib/services/volume/v2/capabilities_client.py b/tempest/lib/services/volume/v2/capabilities_client.py
index b6de5b9..40cb8bf 100644
--- a/tempest/lib/services/volume/v2/capabilities_client.py
+++ b/tempest/lib/services/volume/v2/capabilities_client.py
@@ -19,6 +19,7 @@
 
 
 class CapabilitiesClient(rest_client.RestClient):
+    api_version = "v2"
 
     def show_backend_capabilities(self, host):
         """Shows capabilities for a storage back end.
diff --git a/tempest/lib/services/volume/v2/scheduler_stats_client.py b/tempest/lib/services/volume/v2/scheduler_stats_client.py
index 637254b..3f56f82 100644
--- a/tempest/lib/services/volume/v2/scheduler_stats_client.py
+++ b/tempest/lib/services/volume/v2/scheduler_stats_client.py
@@ -19,6 +19,7 @@
 
 
 class SchedulerStatsClient(rest_client.RestClient):
+    api_version = "v2"
 
     def list_pools(self, detail=False):
         """List all the volumes pools (hosts).
diff --git a/tempest/test_discover/plugins.py b/tempest/test_discover/plugins.py
index 9ddcd9b..276cf3c 100644
--- a/tempest/test_discover/plugins.py
+++ b/tempest/test_discover/plugins.py
@@ -46,10 +46,41 @@
         """Add additional configuration options to tempest.
 
         This method will be run for the plugin during the register_opts()
-        function in tempest.config
+        function in tempest.config.
 
         :param ConfigOpts conf: The conf object that can be used to register
             additional options on.
+
+        Example:
+            >>> # Config options are defined in a config.py module
+            >>> service_option = cfg.BoolOpt(
+            >>>     "my_service",
+            >>>     default=True,
+            >>>     help="Whether or not my service is available")
+            >>>
+            >>> # Note: as long as the group is listed in get_opt_lists,
+            >>> # it will be possible to access its optins in the plugin code
+            >>> # via ("-" in the group name are replaces with "_"):
+            >>> #     CONF.my_service.<option_name>
+            >>> my_service_group = cfg.OptGroup(name="my-service",
+            >>>                                 title="My service options")
+            >>>
+            >>> MyServiceGroup = [<list of options>]
+            >>> # (...) More groups and options...
+            >>>
+            >>> # Plugin is implemented in a plugin.py module
+            >>> from my_plugin import config as my_config
+            >>>
+            >>> def register_opts(self, conf):
+            >>>    conf.register_opt(my_config.service_option,
+            >>>                      group='service_available')
+            >>>    conf.register_group(my_config.my_service_group)
+            >>>    conf.register_opts(my_config.MyService +
+            >>>                       my_config.my_service_group)
+            >>>
+            >>>    conf.register_group(my_config.my_service_feature_group)
+            >>>    conf.register_opts(my_config.MyServiceFeaturesGroup,
+            >>>                       my_config.my_service_feature_group)
         """
         return