Comment 4 for bug 1642692

Reviewed: https://review.openstack.org/415906
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=45f7ff3918ce8d05585d1c2e1740462e711965fe
Submitter: Jenkins
Branch: master

commit 45f7ff3918ce8d05585d1c2e1740462e711965fe
Author: Rodrigo Duarte Sousa <email address hidden>
Date: Tue Jan 3 10:41:07 2017 -0300

    Cascade delete federated_user fk

    The bug was caused by a foreign key in the federated_user table. This
    key prevents a protocol from being deleted after a successful
    authentication has happened (so the creation of a federated user
    via shadowing). We take advantage of the same foreign key by adding the
    cascade delete behavior to it.

    Closes-Bug: 1642692

    Change-Id: I3b3e265d20f0cfe0ee10c6a274d9bdf4e840b742