PIG-3629: Implement STREAM in Tez - Fix issues with localization of resources (abain via rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1568862 13f79535-47bb-0310-9956-ffa450edef68
PIG-3766: Use ONE_TO_ONE edge and IdentityInOut in skewed join intermediate vertex (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1568895 13f79535-47bb-0310-9956-ffa450edef68
PIG-3757: Make scalar work

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1568901 13f79535-47bb-0310-9956-ffa450edef68
PIG-3759: CombinerOptimizer should not optimize cogroup case in tez

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1568902 13f79535-47bb-0310-9956-ffa450edef68
PIG-3758: Fix desc order by in Tez

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1568903 13f79535-47bb-0310-9956-ffa450edef68