Fix rsh command flags order

[dcommisso]

Hi Peter,
the rsh command as echoed by scripts is not working:

$ oc rsh <etcd pod> -n openshift-etcd -c etcd
Defaulted container "etcdctl" out of: etcdctl, etcd, etcd-metrics, etcd-health-monitor, setup (init), etcd-ensure-env-vars (init), etcd-resources-copy (init)
ERRO[0000] exec failed: container_linux.go:380: starting container process caused: exec: "-n": executable file not found in $PATH 
command terminated with exit code 1

since the last parameter in oc rsh is command to execute:

Usage:
  oc rsh [-c CONTAINER] [flags] (POD | TYPE/NAME) COMMAND [args...]