Add swift deployment into all-in-one check build

[Jesse Pretorius]

The swift deployment needs to be added to the all in one build which is part of the gating process.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/141326

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/141326
Committed: https://git.openstack.org/cgit/stackforge/os-ansible-deployment/commit/?id=ffda5b7da7bd8256329f74cbca358ca38b9ba316
Submitter: Jenkins
Branch: master

commit ffda5b7da7bd8256329f74cbca358ca38b9ba316
Author: Jesse Pretorius <email address hidden>
Date: Fri Dec 12 10:50:37 2014 +0000

    Add swift to the all-in-one build check

    This patch adds swift to the all-in-one build check used for testing
    and gate checks. The script will deploy swift and configure glance to
    use swift by default, but this can be disabled by setting the
    environment variable DEPLOY_SWIFT to be any value other than 'yes'.

    This patch also adds comments to various parts of the check script for
    clarity, removes br-snet as it is unused, and has a sprinkle of
    refactoring for improved health and happiness.

    Change-Id: Iabce466018d3895f61dc736087a14b15af08a35b
    Closes-Bug: #1401287