Comment 6 for bug 1598890

Reviewed: https://review.openstack.org/337304
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=8cd91054fbfd4223f1bca949180a26ced0614373
Submitter: Jenkins
Branch: stable/liberty

commit 8cd91054fbfd4223f1bca949180a26ced0614373
Author: Michele Baldessari <email address hidden>
Date: Mon Jul 4 18:09:19 2016 +0200

    Minor updates might fail with missing MysqlClustercheckPassword property

    With the fixes for the galera root password:
    - python-tripleoclient: https://review.openstack.org/317542
    - tripleo-heat-template: https://review.openstack.org/316297

    we added the MysqlClustercheckPassword property which sets the password
    for the clustercheck user. When a user runs a minor update via "openstack
    overcloud update" he will get the following error:

        Property error: resources[1].properties: Property MysqlClustercheckPassword not assigned

    This happens because the new property does not yet have a set value.
    This new property is not set unless we do an "overcloud deploy", because
    the tripleoclient code generating the passwords does not get invoked
    during a minor update.

    We want to make sure that it has a value set. It is not used during a
    minor update in any case but heat does require it.

    Since the process of fixing the galera root password requires a full
    overcloud deploy command anyway, it is okay to give the
    MysqlClustercheckPassword property a default empty value. Upgrades are
    not affected because they do run a a full overcloud deploy command.

    Closes-bug: #1598890

    Change-Id: I4ab82e6fba08279b96e84c48e223262f656f1120