[COOK-2825] SMF does not rely on method script for stop/refresh

- Service management through PID files is very error prone. SMF managed
  PID contracts for us, so we can use :kill [-SIGNAL] to stop
  or refresh the service.
- 'svcadm restart' will automatically call stop, then start if it is not
  defined to be something different in the manifest. We are removing the
  'restart' method for this reason.