Use oslo.log for heat_integrationtests

Later the integration jobs can be tuned to have their own
logging settings.

This change also raises _log_console_output to info, so it is displayed
by default.

Change-Id: Ifcaa6faf76c655e0c8cfd7d76775b80de70062c4
diff --git a/scenario/test_volumes.py b/scenario/test_volumes.py
index 1901b9c..9b12a9c 100644
--- a/scenario/test_volumes.py
+++ b/scenario/test_volumes.py
@@ -10,9 +10,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import logging
 
 from cinderclient import exceptions as cinder_exceptions
+from oslo_log import log as logging
 import six
 from testtools import testcase