HIVE-5095: Hive needs new operator walker for parallelization/optimization for tez (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1518855 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5183: Tez EdgeProperty class has changed (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1518889 13f79535-47bb-0310-9956-ffa450edef68