core: remove permission check for released quota

Removed the permission check for released quota.
A user should be able to release a quota even he is not a consumer of
that quota.

Change-Id: Iec530af23b1e6d41aa9b97ff6337fd4eb48d947a
Bug-Url: https://bugzilla.redhat.com/965622
Signed-off-by: Ofri Masad <omasad@redhat.com>