Comment 3 for bug 1741544

Reviewed: https://review.openstack.org/541962
Committed: https://git.openstack.org/cgit/openstack/tripleo-docs/commit/?id=f622a160f4270536c0ecd4ec11f446f5b85f86e0
Submitter: Zuul
Branch: master

commit f622a160f4270536c0ecd4ec11f446f5b85f86e0
Author: Steve Baker <email address hidden>
Date: Thu Feb 8 13:52:50 2018 +1300

    Simplify container prepare instructions

    Now that the prepare command supports --tag-from-label discovery on
    every image, the separate discover command is no longer required.

    This change also switches the image namespace to
    docker.io/tripleomaster. trunk.registry.rdoproject.org was never
    intended to be used for deploying openstack from since it is a piece
    of infrastructre used in the RDO image build pipeline.
    docker.io/tripleomaster is more appropriate since it contains the
    tested images which are also hosted on trunk.registry.rdoproject.org.

    Change-Id: I4fd54d4374bde9120aa2c74725bfd2db4b3cf3d0
    Closes-Bug: #1741544