Sync common modules from Oslo

Oslo version:
commit  c8b3dc04de9e9946afab1a18617026e35cfa88fb
Merge:  b9d6589 d78b633
Author: Jenkins <jenkins@review.openstack.org>
Date:   Fri May 30 23:37:27 2014 +0000
Name:   Merge "Fixes a simple spelling mistake"

Partially implements: blueprint update-oslo-code

Change-Id: I321f98aea4bfa06ad2aeec16027172bb8996f8b5