Add union type to Hive test.
Add tests for Avro, Parquet, and ORCFile formats.
Remove Hive MAPJOIN hint snippet test, since the hint is no longer needed.
Pig: add new types for 0.13.0. Add IN operator.
Update Pig Trim UDF to take advantage of PrimitiveEvalFunc.
Update Pig replicated join to use single quotes rather than double.
Use IN operator for Hive query.