Updated openstack/openstack
Project: openstack-dev/devstack  312fafd2282ff84de313fa16d8d9e0fa79c0b8a6

Support GlusterFS cinder backend

Commit 0971833 added support for multiple cinder backend types.
It initially only contains lvm and nfs. The following patch adds
glusterfs to the backends supported.

Change-Id: I9d5c1dfd4e0d05fcbfe3c35172150c57aa4e6eb2