Comment 4 for bug 1387973

Reviewed: https://review.openstack.org/133858
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=c5e302ef220803b6c86d588ddcff9a63eaaaccc2
Submitter: Jenkins
Branch: stable/juno

commit c5e302ef220803b6c86d588ddcff9a63eaaaccc2
Author: abhishekkekane <email address hidden>
Date: Tue Nov 11 12:00:27 2014 -0800

    Image not downloaded without restricted property

    If restrict download rule is configured in policy.json, and image is
    added without protected property mentioned in "restricted" rule, then
    normal users (other than admin) are not able to download the image.

    Added logic in policy.py, to allow normal user to download image
    without restricted property.

    https://review.openstack.org/#/c/127923/
    Above patch will fix the issue for master, but as it is too large to
    be back-ported to stable/juno, Nikhil recommended to push only minimal
    changes that fixes this issue after discussing it with the release manager.

    In this patch, I have copied required changes from oslo-incubator
    policy module from commit 33533b0d97639ed828a2fd5e874f16eb1ecfeaa4.
    Note: In juno release, oslo-incubator policy module was not synced
    with glance completely.

    Closes-Bug: #1387973
    Change-Id: Ib85901b073c85ede7da2e9c7333426c8b8de3bb6