Fix flake8 E405 errors

Fix E405 error and start enforcing it.

Trivialfix

Change-Id: I6a55102d03bbcdd5c0c3a5cc75aea0ca37578117
diff --git a/neutron_tempest_plugin/common/ssh.py b/neutron_tempest_plugin/common/ssh.py
index 9812f4c..4829db2 100644
--- a/neutron_tempest_plugin/common/ssh.py
+++ b/neutron_tempest_plugin/common/ssh.py
@@ -146,8 +146,7 @@
     _get_ssh_connection = connect
 
     def close(self):
-        """Closes connection to SSH server and cleanup resources.
-        """
+        """Closes connection to SSH server and cleanup resources."""
         client = self._client
         if client is not None:
             client.close()