[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.
Merge pull request #92 from wanelo-chef/COOK-2825

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