Comment 8 for bug 1161661

Is scheduling a action like 'start'/'reboot'/'resize', or it just is a internal action, which we don't want to expose it to user.
Maybe we can make two type of `action`, one is public, the other is private. 'start'/'reboot' belong to the former, and they can expose to user, the latter like 'schedule'/'reschedule' just expose to admin.