Add 'docker status' check, improve deadline-exceeded error message
Add 'docker status' check, improve deadline-exceeded error message

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