Feature/zen 12947

DEMO:
```
# plu@plu-9: serviced service attach rabbitmq   # notice lowercase instead of RabbitMQ
/
# root@a0fa4e7e1ee7: exit

# plu@plu-9: serviced service start redis
Service scheduled to start.
# plu@plu-9: serviced service stop redis
Service scheduled to stop.

...
```