Comment 4 for bug 1739026

Reviewed: https://review.openstack.org/529470
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=2baca3211a23dc723d9ffcf160cad9e0c5ee4912
Submitter: Zuul
Branch: stable/pike

commit 2baca3211a23dc723d9ffcf160cad9e0c5ee4912
Author: Michele Baldessari <email address hidden>
Date: Tue Dec 12 14:56:33 2017 +0100

    Wait for rabbitmq_ready tag

    We need to wait for rabbitmq_ready exec so that rabbit is fully
    up. This can only happen if we add the tag for it.
    Also we need to make sure that launching the epmd process cannot
    happen. The reason for this is the following:
    When the puppet-rabbitmq module gets invoked (a simple facter run
    will be sufficient) inside the rabbitmq_init_bundle container it spawns
    an epmd process.
    Now if we wait for the Exec[rabbitmq-ready], it means that this epmd
    process is staying around until rabbit is up, but then will disappear
    suddenly when the rabbitmq_init_bundle container exits, which will
    subsequently confuse the rabbitmq cluster and make it fail.

    Partial-Bug: #1739026

    Co-Authored-By: Damien Ciabrini <email address hidden>
    Co-Authored-By: John Eckersberg <email address hidden>

    Change-Id: Ie74a13a6c8181948900ea0de8ee9717f76f3ce79
    (cherry picked from commit bab6ec25323fd9a667efc08825e4bc7b1732f056)