DRILL-864: MergeJoinBatch fails to set record count in ValueVectors in container
DRILL-853: Enable broadcast joins and fix some issues with BroadcastExchange and ScreenCreator.
DRILL-874 : Fix code to handle splitAndTransferTo in BitVector, when copy is required.
DRILL-818: Fix output type while adding date and interval types.
DRILL-855: Improve work assignment parallelization
DRILL-672: Queries against HBase table do not close after the data is returned.