We should return NotFound status if the group doesn't exists
for ControllerGetVolumeGroup RPC call.
And, an empty/OK response for DeleteVolumeGroup if the group
doesn't exists
Signed-off-by: Nikhil-Ladha <nikhilladha1999@gmail.com>
(cherry picked from commit c7d54ab7767e04d597e891d6307249dd5a8cec79)