PIG-3256: Upgrade jython to 2.5.3 (legal concern)

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.11@1459112 13f79535-47bb-0310-9956-ffa450edef68
Preparing for release 0.11.1

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.11@1459157 13f79535-47bb-0310-9956-ffa450edef68
Preparing for release 0.11.1

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.11@1459158 13f79535-47bb-0310-9956-ffa450edef68