Fix H404/405 violations for common code

There is a lot of H404/405 violations in Tempest now, and that leads
difficult to migrate the code to tempest-lib or the other projects'
repos. This patch fixes these violations for common code.

Change-Id: I5ddedcdd4d00ddbd53e1006ba40dce447fba3c20
diff --git a/tempest/common/service_client.py b/tempest/common/service_client.py
index 87e925d..b3a5a09 100644
--- a/tempest/common/service_client.py
+++ b/tempest/common/service_client.py
@@ -57,8 +57,7 @@
 
 
 class ResponseBodyData(object):
-    """Class that wraps an http response and string data into a single value.
-    """
+    """Class that wraps an http response and string data into a single value"""
 
     def __init__(self, response, data):
         self.response = response