Comment 12 for bug 1783132

Reviewed: https://review.openstack.org/587931
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible/commit/?id=4f80bfe34b267da069371ab1c3b901a7d68d4ca6
Submitter: Zuul
Branch: stable/queens

commit 4f80bfe34b267da069371ab1c3b901a7d68d4ca6
Author: Guilherme Steinmüller <email address hidden>
Date: Wed Aug 1 15:04:07 2018 -0300

    Rename designate_galera_database_name

    We need to rename this variable to designate_galera_database
    as is declared in os_designate role.

    Closes-Bug: 1783132
    Change-Id: I39f076e01a3acb13966ff9d5a5b23e7c526289b6