Fix flake8 E405 errors

Fix E405 error and start enforcing it.

Trivialfix

Change-Id: I6a55102d03bbcdd5c0c3a5cc75aea0ca37578117
diff --git a/neutron_tempest_plugin/scenario/test_qos.py b/neutron_tempest_plugin/scenario/test_qos.py
index 702bbaa..6febb79 100644
--- a/neutron_tempest_plugin/scenario/test_qos.py
+++ b/neutron_tempest_plugin/scenario/test_qos.py
@@ -49,8 +49,7 @@
 
 
 def _connect_socket(host, port):
-    """Try to initiate a connection to a host using an ip address
-    and a port.
+    """Try to initiate a connection to a host using an ip address and a port.
 
     Trying couple of times until a timeout is reached in case the listening
     host is not ready yet.