Automatic merge from submit-queue

add alias svc for create_service.go

add alias 'svc' for service in create_service.go so that  alias 'svc'  can be used and also can be seen in help message's Aliases like below:
```shell
$ kubectl create svc -h
Create a service using specified subcommand.

Aliases:
service, svc

Available Commands:
  clusterip    Create a clusterIP service.
  loadbalancer Create a LoadBalancer service.
  nodeport     Create a NodePort service.

Usage:
  kubectl create service [options]
```