Fix int-tests to run under devstack-vm-gate environment

[Nikhil Manchanda]

The current int-tests don't run in a devstack-vm-gate environment.
This needs to be fixed.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/131014
Committed: https://git.openstack.org/cgit/openstack/trove-integration/commit/?id=f2561d8915a0b7d363ba62fbcf68065fe6ac9f1c
Submitter: Jenkins
Branch: master

commit f2561d8915a0b7d363ba62fbcf68065fe6ac9f1c
Author: Nikhil Manchanda <email address hidden>
Date: Sun Oct 26 18:38:12 2014 -0700

    Check for existence of screen before start/stop

    Running devstack in the devstack gate environment doesn't
    create a screen for the running services. This causes the start,
    and stop screen functions in redstack to fail. Fix this by only
    performing the start and stop functions if a screen exists.

    Partial-bug: 1386337
    Change-Id: I2a87e7409575d1000286a7a3742d29a9cc877a8e

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/131057
Committed: https://git.openstack.org/cgit/openstack/trove-integration/commit/?id=d78d4c82c2cab73a113b7defe4aa00359e050032
Submitter: Jenkins
Branch: master

commit d78d4c82c2cab73a113b7defe4aa00359e050032
Author: Nikhil Manchanda <email address hidden>
Date: Mon Oct 27 02:04:44 2014 -0700

    Fix cmd_dsvm_gate_tests to run tests in dsvm gate

    A few configuration workarounds are needed to be able to run the trove
    int-tests as part of the dsvm-gate. Specifically:
    - Updated the swift endpoint in the catalog to be reachable from the guest
    - Updated the jenkins user to connect to the trove guest image as ubuntu
    - Fixed the iptables rules that prevent amqp connections from the devstack
      box to the guests

    Closes-Bug: 1386337
    Change-Id: I2d2c24a7d4ca40c3ab37f37d2759aa97ac2ab95a

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/134072
Committed: https://git.openstack.org/cgit/openstack/trove-integration/commit/?id=415749d057a7c5e2f7b8d9e29b2c3247d114164c
Submitter: Jenkins
Branch: master

commit 415749d057a7c5e2f7b8d9e29b2c3247d114164c
Author: Nikhil Manchanda <email address hidden>
Date: Wed Nov 12 14:55:05 2014 -0800

    Fix the dsvm tests to use the ubuntu ssh user

    The dsvm gate tests run as jenkins, but need to be able to ssh into the
    guest instance as the ubuntu user.

    Closes-bug: 1386337
    Change-Id: I8fd4da3383c17afa5c4fb4c33431eac26a4bcf48