Start using Pyflakes and Hacking

Instead of globally ignoring pyflakes and
hacking warnings, only blacklist those that trigger
very frequently so far, in order to clean them
up in followup commits. Fix and start gating
on the rest already.

Change-Id: Ied7c7250061e3bf379e8286e8ce3b9e4af817faf

glanceclient/shell.py

@@ -296,7 +296,7 @@ class OpenStackImagesShell(object):
     # Compatibility check to remove API version as the trailing component
     # in a service endpoint; also removes a trailing '/'
     def _strip_version(self, endpoint):
-        """Strip a version from the last component of an endpoint if present"""
+        """Strip version from the last component of endpoint if present."""
 
         # Get rid of trailing '/' if present
         if endpoint.endswith('/'):