Merge pull request #42748 from dcbw/cfssl-localup

Automatic merge from submit-queue (batch tested with PRs 43866, 42748)

hack/cluster: download cfssl if not present

hack/local-up-cluster.sh uses cfssl to generate certificates and
will exit it cfssl is not already installed.  But other cluster-up
mechanisms (GCE) that generate certs just download cfssl if not
present.  Make local-up-cluster.sh do that too so users don't have
to bother installing it from somewhere.

hack/local-up-cluster.sh

@@ -805,7 +805,7 @@ if [[ "${START_MODE}" != "kubeletonly" ]]; then
 fi
 
 kube::util::test_openssl_installed
-kube::util::test_cfssl_installed
+kube::util::ensure-cfssl
 
 ### IF the user didn't supply an output/ for the build... Then we detect.
 if [ "$GO_OUT" == "" ]; then