AFAIK the service files are only for services with ports exposed. Since
nova-compute doesn't expose a port, kubecfg returns an error when attempting
to register it:
F1014 17:06:34.329482 32317 kubecfg.go:395] Got request error:
service "novacompute" is invalid: port: invalid value '0'
Change-Id: I4d9f8d50d538f42d520f3d9437ab32aa6a226d2b