Comment 4 for bug 1730687

Reviewed: https://review.openstack.org/518361
Committed: https://git.openstack.org/cgit/openstack/python-tripleoclient/commit/?id=a7166208b7cdd988590bd1e3b1c1f1453d29d1e1
Submitter: Zuul
Branch: master

commit a7166208b7cdd988590bd1e3b1c1f1453d29d1e1
Author: Mathieu Bultel <email address hidden>
Date: Tue Nov 7 16:51:11 2017 +0100

    Do not failed update if no container registry is set

    When the init minor update step is run without any
    container registry file, the cli should not raise
    an exception. We should accept to run it, even if
    the container won't be update. It could be usefull
    for only run package update on the env.

    Change-Id: I73d86d1ec61b9bb6d5f4a5ea8a9bc545ac963420
    Closes-Bug: #1730687