Add cleanup to TestNewSSHClient so that it can survive -race -count=100
Add cleanup to TestNewSSHClient so that it can survive -race -count=100

dlorenc/minikube,warmchang/minikube,dlorenc/minikube,warmchang/minikube,kubernetes/minikube,dalehamel/minikube,warmchang/minikube,kubernetes/minikube,dalehamel/minikube,dlorenc/minikube,dlorenc/minikube,kubernetes/minikube,warmchang/minikube,kubernetes/minikube,kubernetes/minikube,warmchang/minikube,warmchang/minikube,dlorenc/minikube,dlorenc/minikube,dalehamel/minikube,dlorenc/minikube,warmchang/minikube,kubernetes/minikube,kubernetes/minikube,dlorenc/minikube