DRILL-1393: Set record count before clearing SV2 in RecordBatchData
DRILL-1525: Modify hash functions to use XXHash algorithm
DRILL-1526: Move casting logic to utility methods.
DRILL-1347: Update Hive storage plugin to use Hive version to 0.13.1 instead of 0.12.0.
DRILL-1528: Update HiveRecordReader to read Hive Decimal types with scale and precision.