Clean up pep8 E128 violations

Fixed E128 errors.
All ignores are to be removed in the next sequence of patches.

Change-Id: If014be8524a43842b7e6aa3243c517aa25980976
diff --git a/tempest/services/nova/xml/servers_client.py b/tempest/services/nova/xml/servers_client.py
index 833e6d7..27eb10b 100644
--- a/tempest/services/nova/xml/servers_client.py
+++ b/tempest/services/nova/xml/servers_client.py
@@ -197,9 +197,9 @@
             timed_out = int(time.time()) - start >= self.build_timeout
 
             if server_status != status and timed_out:
-                message = 'Server %s failed to reach %s status within the '\
-                'required time (%s s).' % (server_id, status,
-                                          self.build_timeout)
+                message = ('Server %s failed to reach %s status within the '
+                           'required time (%s s).' %
+                           (server_id, status, self.build_timeout))
                 message += ' Current status: %s.' % server_status
                 raise exceptions.TimeoutException(message)