Replace directly import of logging with import oslo_log

The oslo.log (logging) configuration library provides standardized
configuration for all openstack projects. It also provides custom
formatters, handlers and support for context specific
logging (like resource id's etc).

It is better to use the common logging module.

Change-Id: I45933a0256e71f3d51e7b5f4ef5de782e2fa27cf
diff --git a/tempest/api/compute/servers/test_server_actions.py b/tempest/api/compute/servers/test_server_actions.py
index 50910ec..0a94d5e 100644
--- a/tempest/api/compute/servers/test_server_actions.py
+++ b/tempest/api/compute/servers/test_server_actions.py
@@ -13,8 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import logging
-
+from oslo_log import log as logging
 from six.moves.urllib import parse as urlparse
 import testtools
 
diff --git a/tempest/api/orchestration/stacks/test_neutron_resources.py b/tempest/api/orchestration/stacks/test_neutron_resources.py
index a3792b4..bffcb64 100644
--- a/tempest/api/orchestration/stacks/test_neutron_resources.py
+++ b/tempest/api/orchestration/stacks/test_neutron_resources.py
@@ -10,10 +10,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-
-import logging
-
 import netaddr
+from oslo_log import log as logging
 
 from tempest.api.orchestration import base
 from tempest.common.utils import data_utils
diff --git a/tempest/cmd/main.py b/tempest/cmd/main.py
index 641d11c..1090c41 100644
--- a/tempest/cmd/main.py
+++ b/tempest/cmd/main.py
@@ -11,11 +11,11 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import logging
 import sys
 
 from cliff import app
 from cliff import commandmanager
+from oslo_log import log as logging
 from pbr import version