Daemons are not stopped when execution is finished

### Affected version

2.0.0-rc-3 and 1.0.3

### Bug description

When I launch `mvnd`, the daemon it creates doesn't stop once the program finishes its duty.

I discovered it because I set `mvnd` as default built tool in Intellij Idea. This way it's impossible to run a spring boot up using `mvnd spring-boot:run`: if you stop it, the daemon is still alive and the port result as still used, so you can't restart the app. You have to manually do `mvnd --stop`. Really boring.

PS: `mvnd` is blazing fast, I love it.
PPS: fortunately, Intellij finally added Spring Boot in conf files, so I can run it in debug mode without using mvn[d]. Probably they feel the competition with VS Code ;-)

Reproduce the issue by running mvnd spring-boot:run, stopping it, and checking whether the daemon still holds the application port; compare this with mvnd --stop. Trace the daemon lifecycle from the mvnd command entry point through execution completion. Done means stopping the launched application also releases the daemon and its port without requiring a separate manual stop.

Written by the indexing model from the issue text.