Adding test to improve CaptureListener coverage
Adding test to improve CaptureListener coverage

Added a unittest to check the 'capture_task' parameter of CaptureListener class

Change-Id: I29a9e7d5b6d41ab458ca116cc4cec551c09cbd30

pombredanne/taskflow-1,jimbobhickville/taskflow,jimbobhickville/taskflow,junneyang/taskflow,openstack/taskflow,pombredanne/taskflow-1,junneyang/taskflow,openstack/taskflow