drill

7b776e7f - DRILL-2884: 2-Hygiene: Associated cleanup, mostly of DrillResultSetImpl.

DRILL-2884: 2-Hygiene: Associated cleanup, mostly of DrillResultSetImpl. - Re-ordered UserResultsListener methods logically (chronologically). (In UserResultsListener too.) - Re-ordered some other ResultsListener methods more logically (chronologically). - Added ResultsListener logging (incoming and outgoing). - Moved queryId down into ResultListener so ResultListener doesn't need to reach up into DrillResultSetImpl; changed from inner to nested class. - Renamed: - Fixed typo "resultslistener" -> "resultsListener" - MAX -> THROTTLING_QUERY_SIZE_THRESHOLD, queue -> batchQueue, ex -> executionFailureException - Added, purged some TODOs.