Comment 12 for bug 1748970

Reviewed: https://review.openstack.org/544096
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=a1ea04de86ebc57e7c2ba142c346f54aa93745c1
Submitter: Zuul
Branch: stable/queens

commit a1ea04de86ebc57e7c2ba142c346f54aa93745c1
Author: Lance Bragstad <email address hidden>
Date: Tue Feb 13 17:09:55 2018 +0000

    Fix querying role_assignment with system roles

    This commit removes system role assignments when querying keystone
    for a list of assignments pertaining to a specific role. For example,
    `GET /v3/role_assignments?role.id={role_id}`, now returns assignments
    only for that role. Previously, the list contained false positives
    because some system role assignments weren't being removed. This
    was introduced in queens with the system scope work.

    Change-Id: Iab35ae01bb715da5813e62cd09900de555dceaaa
    Closes-Bug: 1748970
    (cherry picked from commit 8748e729b2f139c245316fcece181625978c70a1)