add delete test to cache test
add delete test to cache test

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