Re-enable testing on the commit queue
https://bugs.webkit.org/show_bug.cgi?id=114078

Reviewed by Darin Adler.

Re-enabled the feature and the associated tests.

* Scripts/webkitpy/tool/bot/commitqueuetask.py:
(CommitQueueTask.run):
* Scripts/webkitpy/tool/bot/commitqueuetask_unittest.py:
(CommitQueueTaskTest._run_through_task):
* Scripts/webkitpy/tool/commands/queues_unittest.py:
(CommitQueueTest._mock_test_result):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147826 268f45cc-cd09-0410-ab3c-d52691b4dbfc