Deadlocks in tests in stop deployment task

[Alexander Kislitsky]

Deadlocks appears in tests in rpc receiver in stop_deployment task.
To fix we should use DB queries with lock (with_lockmode('update')).
Also in stop_deployment method we should use nailgun objects instead database models.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/94372

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/94372
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=7bf1a6296d442032f12d5d7d6c9c053f5800f56e
Submitter: Jenkins
Branch: master

commit 7bf1a6296d442032f12d5d7d6c9c053f5800f56e
Author: Alexander Kislitsky <email address hidden>
Date: Tue May 20 17:53:22 2014 +0400

    Fix for deadlocks in stop_deployment task

    Nailgun base object:
    - order_by method added into NailgunCollection
    - get_by_id_lists renamed to filter_by_id_list
    - filtering by param logic extracted to method
    - filter_by_name method added

    Nailgun Node object:
    - move_roles_to_pending_roles method added

    Rpc receiver:
    - stop_deployment task refactored to nailgun objects
    - queries with locking and ordering used in stop_deployment
    - ordering added into locking queries in deploy_resp
    - fetched from db nodes used in deploy_resp

    Change-Id: Idff49dd7e01a159f4d5c4f4208aadf1894346b8e
    Closes-Bug: #1321302