Comment 6 for bug 1778471

Reviewed: https://review.openstack.org/579824
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=d512ede5a0474a320c946a472ecc6f527eaf02b6
Submitter: Zuul
Branch: stable/queens

commit d512ede5a0474a320c946a472ecc6f527eaf02b6
Author: Jiri Stransky <email address hidden>
Date: Mon Jun 25 10:39:56 2018 +0200

    Execute post_update_tasks in update playbook

    We drop the post_update_steps_playbook, and execute post_update_tasks
    as part of the update_steps_playbook. This will ensure that
    post_update_tasks are executed, and they're executed in accordance
    with the `serial: 1` ordering that update_steps_playbook is using. (We
    want to avoid an issue similar to what we've had in bug #1776206).

    (cherry picked from commit 6b3e8aa073ca68fe600288b1dbb05dd384368d3b)
    Change-Id: I15a984172cd5532bc966269d8c68f27b5703733e
    Closes-Bug: #1778471