Comment 8 for bug 1699261

Reviewed: https://review.openstack.org/499137
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=0f2af352d15cb9c486414619a8342e727a2e207c
Submitter: Jenkins
Branch: stable/pike

commit 0f2af352d15cb9c486414619a8342e727a2e207c
Author: Steve Baker <email address hidden>
Date: Tue Aug 15 10:26:24 2017 +1200

    container ovs-agent, ensure br-ex exists

    Currently the container neutron-ovs-agent is stuck in a restart loop
    in many environments because the bridge br-ex is missing.

    This bridge is created by running the puppet class
    neutron::agents::ml2::ovs but limiting that run to tag
    neutron::plugins::ovs::bridge.

    The hiera neutron::agents::ml2::ovs::bridge_mappings should already
    exists to create the bridge with the required settings.

    This change should ensure br-ex exists after step 3.

    Since br-ex is created regardless of the chosen network config,
    environments/docker-network.yaml is not longer required. It can be
    deleted once there are no more references to it in CI and
    documentation.

    Change-Id: Ie425148b0ad0f38e149c5fa0a97d98ec35d0a5bb
    Closes-Bug: #1699261
    Closes-Bug: #1691403
    Closes-Bug: #1689556
    (cherry picked from commit 76f130d6e8f7434433b2602af9794f1e9c742e1f)