CLC should use user data script to start service VMs.
Propagate all tags from service images to service ASGs.
Added a cloud property to extend launch config for the service VMs with arbitrary Bash commands.
Renamed service VMs cloud properties for consistency.
Added upgrade with renamed service VMs cloud properties.

Fixes for: EUCA-10186, EUCA-10187, EUCA-10189, EUCA-10190, EUCA-10191, EUCA-10178, EUCA-9716