add Stoppable interface for Controller which run background subProcess. The...

add Stoppable interface for Controller which run background subProcess. The subProcess can now be killed when the app close
3 jobs for 362-issue in 11 minutes and 3 seconds (queued for 6 seconds)
Status Name Job ID Coverage
  Prepare
passed build-docker #210816
generic_privileged

00:07:47

 
  Build
passed build-ubuntu #210817

00:02:18

passed build-windows #210818

00:03:15