fix test case ok kubeadm to download linux kubeadm binary
fix test case ok kubeadm to download linux kubeadm binary

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