ceph: check if mds create snaprealm when setting quota

If mds does not, return -EOPNOTSUPP.

Link: http://tracker.ceph.com/issues/23491
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
1 file changed