XD-1431 Support multiple AdminServers on same host

- Add Standalone HSQLDB server application
  - Have HsqlServerApplication as boot SpringApplication which loads hsql datasource and start/stop HSQLServerBean
during its context lifecycle
- Make SingleNode server start/stop HSQLServerBean during its lifecycle
- AdminServer and Container wouldn't start the HSQLServerBean (if hsqldb is choosen as batch datasource)
  - Add BatchDatasourceVerificationListener to AdminServer that checks if at least one of the batch datasource profiles is selected and exit AdminServer if not
- Remove jdbc.properties as it is not being used
- Fix tests