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
XD-2023 Update to spring-data-hadoop 2.0.2.RELEASE

- modify build to allow version override for version in IO platform
XD-2029 Tuple: Use AlternativeJdkIdGenerator

- Instead of 3rd party library

- Followed pattern in MessageHeaders but did not include any easy
  way to change the default generator as in SI.
XD-2030 JobExecutions GET endpoint

- Set producible media type to `application\json` for
JobExecutions `GET` endpoints
  - `/jobs/executions`
  - `/jobs/executions?jobname=<jobname>`
Fixing whitespace/alignment issues in `build.gradle`