Comment 4 for bug 1886070

Reviewed: https://review.opendev.org/742177
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=b5b2bb640b93001ffcfb2d09aaee7d586604aa62
Submitter: Zuul
Branch: stable/ussuri

commit b5b2bb640b93001ffcfb2d09aaee7d586604aa62
Author: Alan Bishop <email address hidden>
Date: Fri Jul 10 06:35:11 2020 -0700

    Add BarbicanClient service for configuring edge sites

    A new BarbicanClient tripleo service provides a means of configuring
    the barbican Key Manager settings for cinder, glance and nova services
    running at an edge site. This is necessary because the BarbicanApi
    tripleo service is only capable of configuring the Key Manager settings
    for services running in the control plane.

    For cinder, the BarbicanClient ensures the KeyManager settings are
    available to the cinder-volume and cinder-backup services. This is
    necessary because the Key Manager setttings are traditionally associated
    with the cinder-api service, but cinder-api is not deployed at the edge.

    Closes-Bug: #1886070
    Change-Id: I17d6c3a3af5b192b77d264ff3e94e64ef6064c77
    (cherry picked from commit 5080e45fd283c795f973c86719d1959948f642e3)