Comment 7 for bug 1523664

Reviewed: https://review.openstack.org/314672
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=f811287beadab3c6d5ebdcae57ea6844284f72ea
Submitter: Jenkins
Branch: stable/liberty

commit f811287beadab3c6d5ebdcae57ea6844284f72ea
Author: Ron De Rose <email address hidden>
Date: Fri Dec 11 20:29:09 2015 +0000

    Changed the key repo validation to allow read only

    Fernet token operations would fail if the key respository did not
    have write access, even though it would only need read access.
    Added logic to validation to only check for read or read/write
    access based on what is required.

    Change-Id: I1ac8c3bd549055d5a13e0f5785dede42d710cf9d
    Closes-Bug: 1523664
    (cherry picked from commit 0aaa3ab1710c3bd9ca7800cc2156a483bd463a11)