Add delete_on_termination for compute API v2.79 - os-volume_attachments

This adds delete_on_termination field for the compute API response schema
for the 2.79 microversion in the following APIs:

  - GET /servers/{server_id}/os-volume_attachments (list)
  - GET /servers/{server_id}/os-volume_attachments/{volume_id} (show)
  - POST /servers/{server_id}/os-volume_attachments (attach)

Change-Id: I7a9b22477b800c6d60acb67c27aff5dcb61d7875
diff --git a/doc/source/microversion_testing.rst b/doc/source/microversion_testing.rst
index 06062c2..f37342e 100644
--- a/doc/source/microversion_testing.rst
+++ b/doc/source/microversion_testing.rst
@@ -426,6 +426,10 @@
 
   .. _2.73: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id66
 
+  * `2.79`_
+
+  .. _2.79: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#maximum-in-train 
+
 * Volume
 
   * `3.3`_
diff --git a/tempest/lib/api_schema/response/compute/v2_79/__init__.py b/tempest/lib/api_schema/response/compute/v2_79/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tempest/lib/api_schema/response/compute/v2_79/__init__.py
diff --git a/tempest/lib/api_schema/response/compute/v2_79/servers.py b/tempest/lib/api_schema/response/compute/v2_79/servers.py
new file mode 100644
index 0000000..58dcba8
--- /dev/null
+++ b/tempest/lib/api_schema/response/compute/v2_79/servers.py
@@ -0,0 +1,67 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import copy
+
+from tempest.lib.api_schema.response.compute.v2_73 import servers as servers273
+
+
+###########################################################################
+#
+# 2.79:
+#
+# The delete_on_termination parameter is now returned in the response body
+# of the following calls:
+#
+# - GET /servers/{server_id}/os-volume_attachments
+# - GET /servers/{server_id}/os-volume_attachments/{volume_id}
+# - POST /servers/{server_id}/os-volume_attachments
+###########################################################################
+
+attach_volume = copy.deepcopy(servers273.attach_volume)
+attach_volume['response_body']['properties']['volumeAttachment'][
+    'properties'].update({'delete_on_termination': {'type': 'boolean'}})
+attach_volume['response_body']['properties']['volumeAttachment'][
+    'required'].append('delete_on_termination')
+
+show_volume_attachment = copy.deepcopy(servers273.show_volume_attachment)
+show_volume_attachment['response_body']['properties']['volumeAttachment'][
+    'properties'].update({'delete_on_termination': {'type': 'boolean'}})
+show_volume_attachment['response_body']['properties'][
+    'volumeAttachment']['required'].append('delete_on_termination')
+
+list_volume_attachments = copy.deepcopy(servers273.list_volume_attachments)
+list_volume_attachments['response_body']['properties']['volumeAttachments'][
+    'items']['properties'].update(
+        {'delete_on_termination': {'type': 'boolean'}})
+list_volume_attachments['response_body']['properties'][
+    'volumeAttachments']['items']['required'].append('delete_on_termination')
+
+# NOTE(zhufl): Below are the unchanged schema in this microversion. We
+# need to keep this schema in this file to have the generic way to select the
+# right schema based on self.schema_versions_info mapping in service client.
+# ****** Schemas unchanged since microversion 2.73 ***
+rebuild_server = copy.deepcopy(servers273.rebuild_server)
+rebuild_server_with_admin_pass = copy.deepcopy(
+    servers273.rebuild_server_with_admin_pass)
+update_server = copy.deepcopy(servers273.update_server)
+get_server = copy.deepcopy(servers273.get_server)
+list_servers_detail = copy.deepcopy(servers273.list_servers_detail)
+list_servers = copy.deepcopy(servers273.list_servers)
+show_server_diagnostics = copy.deepcopy(servers273.show_server_diagnostics)
+get_remote_consoles = copy.deepcopy(servers273.get_remote_consoles)
+list_tags = copy.deepcopy(servers273.list_tags)
+update_all_tags = copy.deepcopy(servers273.update_all_tags)
+delete_all_tags = copy.deepcopy(servers273.delete_all_tags)
+check_tag_existence = copy.deepcopy(servers273.check_tag_existence)
+update_tag = copy.deepcopy(servers273.update_tag)
+delete_tag = copy.deepcopy(servers273.delete_tag)
diff --git a/tempest/lib/services/compute/servers_client.py b/tempest/lib/services/compute/servers_client.py
index c36f80a..e58890c 100644
--- a/tempest/lib/services/compute/servers_client.py
+++ b/tempest/lib/services/compute/servers_client.py
@@ -36,6 +36,7 @@
 from tempest.lib.api_schema.response.compute.v2_70 import servers as schemav270
 from tempest.lib.api_schema.response.compute.v2_71 import servers as schemav271
 from tempest.lib.api_schema.response.compute.v2_73 import servers as schemav273
+from tempest.lib.api_schema.response.compute.v2_79 import servers as schemav279
 from tempest.lib.api_schema.response.compute.v2_8 import servers as schemav28
 from tempest.lib.api_schema.response.compute.v2_9 import servers as schemav29
 from tempest.lib.common import rest_client
@@ -61,7 +62,8 @@
         {'min': '2.63', 'max': '2.69', 'schema': schemav263},
         {'min': '2.70', 'max': '2.70', 'schema': schemav270},
         {'min': '2.71', 'max': '2.72', 'schema': schemav271},
-        {'min': '2.73', 'max': None, 'schema': schemav273}]
+        {'min': '2.73', 'max': '2.78', 'schema': schemav273},
+        {'min': '2.79', 'max': None, 'schema': schemav279}]
 
     def __init__(self, auth_provider, service, region,
                  enable_instance_password=True, **kwargs):