Add Backup Service to 'cinder-all' script

Backup service is missing in 'cinder-all' script, this patch simply
add it so that this all-in-one script could launch all Cinder
Services.

Change-Id: I29c7355baabddd18a14fe9f97b71f58d24a033dc
Merge "Add Backup Service to 'cinder-all' script"