Nimrod:
* Add database migration functionality and CLI commands
* Cleanup CLI commands
* Master Stability fixes
Portal Backend:
* Integrate with main Nimrod/G repository
* Add /api/resources/{resName}/agents endpoint
* Bump Spring Boot & Security versions
* Integrate Spring Boot Actuator (for k8s)
* Allow CORS patterns to be configured via application.yml
* Update to JUnit 5
* Configure DB permissions to allow users to use the CLI
* Add "db init" CLI command
* Add "rmq init" CLI command
* Misc fixes & cleanups
