XD-1111 delete containerId from repo

- in @AfterClass delete(containerId) from RedisRuntimeContainerInfoRepository
Remove RestConfiguration bean from admin-server.xml

- AdminServerApplication imports "RestConfiguration" through @Import
  Configuration. Hence, removing from admin-server.xml
XD-1103: Revert to use of SimpleDriverDataSource

There's still a problem with the order in which properties are
used with TomcatDataSourceConfiguration. DSL properties are
ignored which breaks the basic functionality of the JDBC sink
module. Reverting to the old class until this is resolved.

Also add extra script tests for JDBC sink.
XD-1155 Adding exclusions for spring-data-hadoop transitive dependencies
Minor script test refactoring