Updated openstack/openstack
Project: openstack/nova  578d7e0b17227fc9b8ad111223289377c905f935

Handle situation when key not memcached

LOG a warning message if the key not memcached successful. This will
happen if memcached module is used but the memcached servers are not
reachable.

Change-Id: Ia3c51fe8fc82060586a014f5cb1083d5695ab455
Closes-bug: 1213660