Temporary fix while reworking scr support
[KARAF-2763] Use a plugin for SCR support to work around the fact that maven can't add build artifacts to plugin class path
[KARAF-2763] Remove reference to old scr.support module
[KARAF-2763] Improvements to the scr plugin to not scan classes in dependencies and to handle lifecycle methods correctly
Also remove System.out.println() calls.
[KARAF-2756] Fix completer arguments to handle more combinations of @Completer / @CompleterValues / CompletableFunction
Fix SimpleCommand