Remove check for obsolete kube-dns label & validate kubernetes.default rather than localhost
Remove check for obsolete kube-dns label & validate kubernetes.default rather than localhost

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