Comment 2 for bug 1823579

Reviewed: https://review.openstack.org/650598
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=d4ea8e686463214a52b1d0004206fbeeb1cda258
Submitter: Zuul
Branch: master

commit d4ea8e686463214a52b1d0004206fbeeb1cda258
Author: Steve Baker <email address hidden>
Date: Mon Apr 8 12:44:54 2019 +1200

    Add parameter ContainerImageRegistryCredentials

    This defines the interface to specify the authentication credentials
    for container image registries which require them. It is separate from
    the ContainerImagePrepare parameter so that the credentials only need
    to be stated once, and so the secrets can be flagged as hidden
    parameters.

    Change-Id: I3b2743cd48b2083468acb83a4ddeb98a93d795a2
    Partial-Bug: #1823579