HIVE-5294 - Create collect UDF and make evaluator reusable (Edward Capriolo via Brock Noland)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1524254 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5167: webhcat_config.sh checks for env variables being set before sourcing webhcat-env.sh (Thejas M Nair via Daniel Dai, Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1524257 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5267 : Use array instead of Collections if possible in DemuxOperator (Navis via Yin Huai)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1524271 13f79535-47bb-0310-9956-ffa450edef68