Fix the setup-loopback-device service config for upstart

When we use the upstart, setup-loopback should be running as a
service to pass the salt linux.storage.loopback state
(service.running).

Change-Id: I9b19a94126b497d89bd6d05f43dca1df0304c0c6
Closes-bug: PROD-19847
1 file changed