Add Mitaka Milestone for networking-l2gw

[Abhishek Raut]

networking-l2gw should follow milestone tagging for every release

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/315704

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/315704
Committed: https://git.openstack.org/cgit/openstack/networking-l2gw/commit/?id=961faf3f650c1ce7f84535c4250adb8a2d60fe28
Submitter: Jenkins
Branch: master

commit 961faf3f650c1ce7f84535c4250adb8a2d60fe28
Author: Abhishek Raut <email address hidden>
Date: Wed May 4 03:27:24 2016 -0700

    Tag the alembic migration revisions for Mitaka

    Previously when we had one repo with one alembic branch we would
    create a milestone revision on that single branch. Now we have
    multiple repos and expand/contract branches for each repo.
    So from now on we tag the final revision on every branch when we make
    a milestone release.

    Since no new migration scripts were added during the Mitaka cycle
    in networking-l2gw, this patch adds the tag in Liberty expand
    and contract scripts.

    Change-Id: I720f1089dc725f8e3856725a6a4334115a44cd24
    Closes-Bug: #1581158

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/mitaka
Review: https://review.openstack.org/316222

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/316222
Committed: https://git.openstack.org/cgit/openstack/networking-l2gw/commit/?id=4d29631208f4e35fbba030c42924871a0888bb86
Submitter: Jenkins
Branch: stable/mitaka

commit 4d29631208f4e35fbba030c42924871a0888bb86
Author: Abhishek Raut <email address hidden>
Date: Wed May 4 03:27:24 2016 -0700

    Tag the alembic migration revisions for Mitaka

    Previously when we had one repo with one alembic branch we would
    create a milestone revision on that single branch. Now we have
    multiple repos and expand/contract branches for each repo.
    So from now on we tag the final revision on every branch when we make
    a milestone release.

    Since no new migration scripts were added during the Mitaka cycle
    in networking-l2gw, this patch adds the tag in Liberty expand
    and contract scripts.

    Change-Id: I720f1089dc725f8e3856725a6a4334115a44cd24
    Closes-Bug: #1581158
    (cherry picked from commit 961faf3f650c1ce7f84535c4250adb8a2d60fe28)