Token are not revoked when a role from group is revoked

[Kévin Bernard-Allies]

Since the commit https://review.openstack.org/#/c/115338,
when a groupe role is revoked, the tokens of the members of this group are not revoked.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/121628

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/121628
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=2e4d3e4b6f59f58e681f7d1d07516cd6b5cd4156
Submitter: Jenkins
Branch: master

commit 2e4d3e4b6f59f58e681f7d1d07516cd6b5cd4156
Author: Kévin Bernard-Allies <email address hidden>
Date: Mon Sep 15 18:55:12 2014 +0200

    Revoke the tokens of group members when a group role is revoked

    Fixes a bug introduced by the previous commit:
    https://review.openstack.org/#/c/115338/

    If revoke_api is not enabled, tokens of group members are not revoked
    when a group role is revoked.

    Change-Id: I7542ee775ddd6fd240ecb370a3e243e465accbb0
    Closes-Bug: 1369664