Merge OOZIE-1663, OOZIE-1664, OOZIE-1314, OOZIE-1577

- Merge OOZIE-1663: Queuedump to display command type
- Merge OOZIE-1664: PollablePriorityDelayQueue.poll() returns elements with +ve delay
- Merge OOZIE-1314: IllegalArgumentException: wfId cannot be empty
- Merge OOZIE-1577: Oozie coordinator job with identical start and end time remains RUNNING forever