Comment 5 for bug 1452359

Because this bug couldn't be verified via usual methods, and there is a mandatory unit test for every commit that checks locks when flushing environment [1] , I assume that bug is gone. So I move state to Fix Released.

[1]https://github.com/openstack/fuel-web/blob/46fbd9e21e91af057335cfa7e1f29159c1eb82ac/nailgun/nailgun/test/unit/test_deadlock_detector.py#L80-L85