The "neutron-rpc-server" is not a configurable service that can be
enabled or disabled. This service is a dependant process of the
"neutron-api-server" service that is spawned when the Neutron API
uses the WSGI module. The execution of this child service will depend
on:
* The Neutron API service when running with the WSGI module. If
the Neutron API uses the eventlet module, this service won't run
(the RPC workers will be spawned by the eventlet server).
* The "rpc_workers" configuration variable. If this variable is
explicitly set to "0", the server must not run.
Closes-Bug: #2073844
Related-Bug: #2073572
Change-Id: Ic019423ca033ded8609d82bb11841b975862ac14