Keep ~/.minikube/cache directory

We shouldn't blow away the cache on every integration test.

keep .minikube for tests

Author: r2d4

hack/jenkins/common.sh

@@ -73,8 +73,6 @@ fi
 MINIKUBE_WANTREPORTERRORPROMPT=False sudo ./out/minikube-${OS_ARCH} delete \
 || MINIKUBE_WANTREPORTERRORPROMPT=False ./out/minikube-${OS_ARCH} delete \
 || true
-sudo rm -rf $HOME/.minikube || true
-sudo rm -rf $HOME/.kube || true
 
 # See the default image
 ./out/minikube-${OS_ARCH} start -h | grep iso
@@ -91,8 +89,6 @@ sudo cat $KUBECONFIG
 MINIKUBE_WANTREPORTERRORPROMPT=False sudo ./out/minikube-${OS_ARCH} delete \
 || MINIKUBE_WANTREPORTERRORPROMPT=False ./out/minikube-${OS_ARCH} delete \
 || true
-sudo rm -rf $HOME/.minikube || true
-sudo rm -rf $HOME/.kube || true
 
 if [[ $result -eq 0 ]]; then
   status="success"