Comment 6 for bug 1812962

Reviewed: https://review.openstack.org/632640
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=8a818ab22618321fa78a9414f458b3029ac75be6
Submitter: Zuul
Branch: master

commit 8a818ab22618321fa78a9414f458b3029ac75be6
Author: Martin André <email address hidden>
Date: Tue Jan 22 18:08:14 2019 +0100

    Apply changes to cluster using updated inventory

    It could cause issue when being on inventory containing nodes marked as
    new.

    Specifically, it caused an undefined ansible variable error when
    re-running the deploy playbook on an inventory that contained nodes in
    the new_masters group.

    Closes-Bug: #1812962
    Change-Id: Iaf9403b5f60f06769d94317d261de8cad94274ab