PIG-4113: TEZ-1386 breaks hadoop 2 compilation in trunk (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1617173 13f79535-47bb-0310-9956-ffa450edef68
PIG-4112: NPE in packager when union + group-by followed by replicated join in Tez (rohini via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1617200 13f79535-47bb-0310-9956-ffa450edef68