Updated openstack/openstack
Project: openstack/nova  969a8f0ee9559d0ca479c3b6ea56bfcd3ac2214d
null
nova docker driver cannot find cgroup in /proc/mounts on RHEL

In order to support the docker hypervisor on rhel/centos or fedora
we had to adapt the function which resolves the cgroup path.

Change-Id: Ie24028f822d91d65d4f90a7941e7b11874a3b425
Closes-Bug: #1243101