HIVE-5437: Add map/reduce input map to MapWork/ReduceWork for multi input (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1529041 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5439: Set input edge map for map join operator in Tez (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1529074 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5390: custom LogicalIOProcessor - reduce record processor (Thejas Nair via Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1529076 13f79535-47bb-0310-9956-ffa450edef68