Fix status codes that are returned for Get/Delete RPC calls for VolumeGroup/VolumeGroupSnapshot. Signed-off-by: Nikhil-Ladha <nikhilladha1999@gmail.com> (cherry picked from commit 18a62ec9de170b180197b75c0a67b5fc4f6b7e19)
deleteImage()
Delete()
reserveSnap()