Consider review all Service objects in order to check how apps connect to an external spark cluster

[rimolive]

As @elmiko said: as i recall, the headless service uses a different port for connection. like the main service is for using the 7077 port to communicate with the master, the workers need a different port for communicating with the master. i think we probably need to review what pieces are needed. i think we _might_ be able to condense those ports into the main service as it looks like a service can handle multiple ports. but i'm not 100% sure on that. that link is for an s2i driver app, but i think the same could be applied to the cluster that's the other issue too, the workers need fqdn back to the driver