Comment 1 for bug 1583780

Reviewed: https://review.openstack.org/318750
Committed: https://git.openstack.org/cgit/openstack/keystoneauth/commit/?id=553a523830a31b1fb2c81ddfdc926c5c9170bad8
Submitter: Jenkins
Branch: master

commit 553a523830a31b1fb2c81ddfdc926c5c9170bad8
Author: Alvaro Lopez Garcia <email address hidden>
Date: Thu May 19 17:48:41 2016 +0200

    oidc: add OidcAccessToken class to authenticate reusing an access token

    Some services or users may have obtained an access token, so it would be
    possible to authenticate using this token directly (for example a
    service where the user has already logged in). This new class makes
    possible to use an access token to authenticate directly with Keystone,
    exchanging it for a Keystone token.

    Closes-bug: 1583780
    Change-Id: I5a31270194a3d1aa48de709dba49afde460731e2