Comment 29 for bug 1529691

Reviewed: https://review.openstack.org/337463
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=e96920644888c46b3091bc6130a4df197c4987b8
Submitter: Jenkins
Branch: stable/7.0

commit e96920644888c46b3091bc6130a4df197c4987b8
Author: Artem Roma <email address hidden>
Date: Thu Jan 28 12:58:09 2016 +0200

    Add 'deployed_before' flag to cluster that forbids stop deployment

    When cluster is successfuly deployed, that is, has 'operational' status,
    'deployed_before' key is added to generated attributes of the cluster.
    This flag then is used to determine whether stop action is allowed for
    the cluster.

    Conflicts:
     nailgun/nailgun/objects/cluster.py
     nailgun/nailgun/test/integration/test_task_logging.py
     nailgun/nailgun/test/integration/test_verify_networks_task_manager.py
     nailgun/nailgun/test/unit/test_objects.py

    Change-Id: I8ecfca5819352ac27d7cec91e22f8006d8c3d8de
    Closes-Bug: #1529691
    (cherry picked from commit b2c4b7d10207391d52102cc2dd4e140a90e31608)