OOZIE-1461 provide an option to auto-deploy launcher jar onto HDFS system libpath (ryota,virag via virag)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1520624 13f79535-47bb-0310-9956-ffa450edef68
OOZIE-1522 SignalX may try to insert transition for a forked node twice (virag)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1520625 13f79535-47bb-0310-9956-ffa450edef68
OOZIE-1499 Update only necessary columns and consolidate JPA Executors (ryota)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1520716 13f79535-47bb-0310-9956-ffa450edef68