* Admins have full permissions to edit and delete images
from syspanel, plus Glance's client returns a proper
403 error instead of 401, so inappropriate access no longer
logs the user out inappropriately. Fixes bug 955744.
* Regular users can edit and delete if their tenant owns the
image. Fixes bug 950364 and fixes bug 737360.
Note, this requires the latest version of Glance.
Change-Id: Ib816d7e6e1320a9024c5dbe95b04249291ec0463