PIG-4140: VertexManagerEvent.getUserPayload returns ReadOnlyBuffer after TEZ-1449

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1620101 13f79535-47bb-0310-9956-ffa450edef68
PIG-4076: Fix pom file

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1620102 13f79535-47bb-0310-9956-ffa450edef68
PIG-4139: pig query throws error java.lang.NoSuchFieldException: jobsInProgress on MRv1 (satish via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1620107 13f79535-47bb-0310-9956-ffa450edef68