Comment 3 for bug 1638900

Reviewed: https://review.openstack.org/394267
Committed: https://git.openstack.org/cgit/openstack/kolla/commit/?id=18c3918f5c0692c928084f4b4a5ed60eda9b90ed
Submitter: Jenkins
Branch: stable/newton

commit 18c3918f5c0692c928084f4b4a5ed60eda9b90ed
Author: Paul Bourke <email address hidden>
Date: Thu Nov 3 12:31:07 2016 +0000

    Fix plugin parsing for base images

    If we try to add a plugin to a base image, e.g.

    [neutron-base-plugin-neutron-fwaas]
    type = git
    location = https://github.com/openstack/neutron-fwaas
    reference = master

    The build will fail as it parses the above as both
    "neutron-base-plugin-neutron-fwaas" and "base-plugin-neutron-fwaas".

    Update the regex to ensure the image name is anchored to the beginning of the
    conf section.

    Change-Id: I4099ebd0d25cd28a9bb3bdc4fcfbf311ce22a3fd
    Closes-Bug: #1638900
    (cherry picked from commit 5ddba7892df71d23fefbf7116e8cfec11a2f41da)