Comment 7 for bug 1896009

Reviewed: https://review.opendev.org/752618
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=0f0e7fa1193e3dc63179a682a7256ae3368bf0be
Submitter: Zuul
Branch: stable/ussuri

commit 0f0e7fa1193e3dc63179a682a7256ae3368bf0be
Author: Damien Ciabrini <email address hidden>
Date: Thu Sep 17 16:09:50 2020 +0200

    Remove race during mysql database creation

    The mysql database is create by container mysql_bootstrap,
    which let Kolla run mysqld_safe temporarily, and then
    let TripleO run it for additional setup.

    Before running the second temporary mysqld server, make
    sure that the mysqld_safe script started by Kolla is
    always stopped, to avoid any race condition that would
    cause the second mysqld_safe server to be killed by the
    Kolla one.

    Change-Id: Id7cf45fb95d3c8a2c5519b1a13a5651cf414a115
    Co-Authored-By: Michele Baldessari <email address hidden>
    Closes-Bug: #1896009