Fix flake8 E265 errors

Fix E265 error and start enforcing it.

Trivialfix

Change-Id: I947599c95c92376657eddaace190b728b8987a57
diff --git a/neutron_tempest_plugin/common/utils.py b/neutron_tempest_plugin/common/utils.py
index 76fb38f..fa7bb8b 100644
--- a/neutron_tempest_plugin/common/utils.py
+++ b/neutron_tempest_plugin/common/utils.py
@@ -69,7 +69,7 @@
                 eventlet.sleep(sleep)
     except eventlet.Timeout:
         if exception is not None:
-            #pylint: disable=raising-bad-type
+            # pylint: disable=raising-bad-type
             raise exception
         raise WaitTimeout("Timed out after %d seconds" % timeout)