Trove plugin should install dashboard if horizon enabled

[Peter Stachowski]

At present if the Trove plugin is enabled and Horizon is enabled, the Trove dashboard still needs to be enabled (which is currently done by redstack). This should be handled by the Trove plugin itself: if Trove and Horizon are installed, the dashboard should be automatically enabled.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/331283

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/331283
Committed: https://git.openstack.org/cgit/openstack/trove/commit/?id=bd76eda2a3d9156f118da3647d4a8efc04e275b8
Submitter: Jenkins
Branch: master

commit bd76eda2a3d9156f118da3647d4a8efc04e275b8
Author: Peter Stachowski <email address hidden>
Date: Fri Jun 17 13:51:38 2016 -0400

    Have Trove plugin install dashboard

    At present if the Trove plugin is enabled and Horizon is enabled,
    the Trove dashboard still needs to be enabled (which is currently
    done by redstack). This should be handled by the Trove plugin
    itself.

    With this fix, if Trove and Horizon are installed the dashboard
    will be automatically set up.

    Some variable names were modified slightly as well to bring
    them in line with the rest.

    The cleanup code was also moved to the 'stop' section, which is
    where it probably belonged right from the beginning.

    Depends-On: I71cf27a57e8d2cd141928f26ac01bd5ca14c723f
    Change-Id: I6586801bff4282e3bbf11e45e4f171fffcab285e
    Partial-Bug: #1593806