OOZIE-1172 Add documentation on how to get Java actions to authenticate properly on Kerberos-enabled clusters (rkanter)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1439688 13f79535-47bb-0310-9956-ffa450edef68
OOZIE-1193 upgrade jython to 2.5.3 for Pig in Oozie due to jython 2.5.0 legal issues (bowenzhangusa via rkanter)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1439726 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of github.com:griddynamics/oozie into trunk-gd