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

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
 

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

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