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"

Change-Id: Ib40f7e4784174dfa848b45e577f8ba4a99334bf3
Implements: blueprint update-oslo-code
Merge "Sync common modules from Oslo"