Comment 3 for bug 1592169

Reviewed: https://review.openstack.org/347543
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=bc99dc76775d22eca01b818f37de35a76ece9d72
Submitter: Jenkins
Branch: master

commit bc99dc76775d22eca01b818f37de35a76ece9d72
Author: Colleen Murphy <email address hidden>
Date: Tue Jul 26 13:02:42 2016 -0700

    Add dummy domain_id column to cached role

    When token caching is turned on, upgrading from stable/liberty to
    stable/mitaka or master causes tokens to fail to be issued for the
    time-to-live of the cache. This is because as part of the token
    issuance the token's role is looked up, and the cached version of the
    role immediately after upgrade does not have a domain_id field, even
    though that column was successfully added to the role database. This
    patch hacks around that by artificially adding a null domain_id value
    to the role reference.

    This must be done in the manager, as opposed to the driver, because it
    is the manager that is caching the value and so modifying the value
    returned by the driver has no effect.

    Change-Id: I55c791486f2a26ae995f693370b016895176a16f
    Closes-bug: #1592169