ControllableServerLaunchConfiguration should not keep state!

ControllableServerLaunchConfiguration cannot keep state. Currently it is caching the shutdown controller, however, the launch config is not re-instantiated on the fly, and so keeping any state here is a very bad idea.

Use case:
1) Create 1 server in rse mode, start, stop
2) create 2nd server in local mode
3) Try to start, watch it attempt to use rse to start.