We need to delete the fetch directory container on stack deletion
This is a valid bug because it count's as clean up. However it's low priority because not acting on this bug shouldn't interrupt normal operations. This is because each new deployment of ceph should have a new FSID and that unique FSID will prevent older fetch directories from interfering with new ones (unless the deployment plan is not cleaned up because the overcloud was not correctly removed and the same FSID is re-used as described in https://access.redhat.com/solutions/4126361).
*** This bug has been marked as a duplicate of bug 1769719 ***