PIG-4122: Fix hadoopversion 23 compilation due to TEZ-1194

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1617795 13f79535-47bb-0310-9956-ffa450edef68
PIG-4114: Add Native operator to tez

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1617798 13f79535-47bb-0310-9956-ffa450edef68
PIG-4123: Increase memory for TezMiniCluster

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1617800 13f79535-47bb-0310-9956-ffa450edef68
Merge latest trunk changes


git-svn-id: https://svn.apache.org/repos/asf/pig/branches/maven@1617821 13f79535-47bb-0310-9956-ffa450edef68