Replaced sidekick launch command with a wildcard. Will start both 1 and
2 discovery services.
  ```
  $ fleetctl start apache-discovery.*.service
  $ fleetctl list-units
  UNIT                        MACHINE                 ACTIVE    SUB
  myapp.service               c9de9451.../10.10.1.3   active    running
  apache.1.service            491586a6.../10.10.1.2   active    running
  apache.2.service            148a18ff.../10.10.1.1   active    running
  apache-discovery.1.service  491586a6.../10.10.1.2   active    running
  apache-discovery.2.service  148a18ff.../10.10.1.1   active    running
  ```