Fix url index out of range error in service
Fix url index out of range error in service

* if there is no node port, service panics accessing url
* since the length of array is 3 when there is no node port, accessing u[3] results in
	index out of range

kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,kubernetes/minikube,kubernetes/minikube