XD-2316 Fix batch config REST endpoint

 - If the batch job is not deployed and has no entry in batch job repository,
the detailed job info will not be added for that job. We will only show the job
definition/deployment status from XD ZK repositories.
 - Also, make the `/batch/configurations` endpoint to produce only `application/json`
XD-2427 Use repo.spring.io as NPM repository

* Add `.npmrc`
* Add information to `README.md`

XD-2427 Code Review - Fix spelling in `README.md`
XD-2501 upgraded boot dependencies
XD-1461 Use Hadoop mini-cluster test support in XD tests

- Remove HadoopFileSystemTestSupport
- Change RemoteFileToHadoopTaskletTests, RemoteFileToHadoopTests and
  JobCommandWithHadoopTests to use minicluster.
XD-2490 Update to reactor 2.0 snapshots
XD-2122: Use roles for security access