XD-1953 - Update to Spring Batch Admin 1.3.0.RELEASE
Maven POM: update pivotal.io email
XD-1660: Add Zookeeper install script

XD-1660: Change start tip in install-zookeeper

XD-1660: Remove unnecessary code

XD-1660 Do not hard-code Zookeeper version

* Include basic ZooKeeper configuration file
* Polishing