- Add DebugAddress helper to validate and parse the (legacy) debug-port and debug-address. Later has precedence.
 - Streamline the CommandBuilder implementation ensuring that the Java and Docker specific code runs inside the command builder and is not spilled out to the AbstractLocalDeployerSupport or AppLocalDeployer.
 - Update affected tests (also migrate those to JUnit5).
 - Improve code cohesion and remove death code.

 - Change GUID from 'port' to 'deployerId-index'.
 - Allow the Docker and Java command builder use different port range. Needed to allow in-container Skipper to operate with both maven and docker resources.