[Upgrade] Need to extend rollback cases

[Andrey Sledzinskiy]

We need to modify rollback_automatically_ha_one_controller_env test to use 'ceph_multinode_compact' and after rollback to add another one ceph node
also we need to add test on node deletion after rollback - we can use 'deploy_neutron_gre' snapshot for that

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/171603

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/171603
Committed: https://git.openstack.org/cgit/stackforge/fuel-qa/commit/?id=b5184a2acaef104bdf1917635de0c371f05111e7
Submitter: Jenkins
Branch: master

commit b5184a2acaef104bdf1917635de0c371f05111e7
Author: asledzinskiy <email address hidden>
Date: Wed Apr 8 15:48:52 2015 +0300

    Extend rollback tests

    - Add test to delete node after rollback
    - Modify test rollback_automatically_ha_one_controller_env to use
    ceph_multinode_compact snapshot and add ceph node after rollback

    Change-Id: If5a552ad7bd2ec50f133a259929d411b5dbfa11a
    Closes-Bug: #1441552