Set sad components to sleeping when a worker gets stopped.
Set sad components to sleeping when a worker gets stopped.

reviewd by: Xavier Queralt
Fixes #1004

timvideos/flumotion,flumotion-mirror/flumotion,Flumotion/flumotion,flumotion-mirror/flumotion,timvideos/flumotion,Flumotion/flumotion,Flumotion/flumotion,Flumotion/flumotion,timvideos/flumotion