update metrics to true like it is for kube-apiserver

Kubernetes-commit: 456fd386dc6db8ba5ced338a5935de8229c14047

pkg/server/config.go

@@ -262,6 +262,7 @@ func NewConfig(codecs serializer.CodecFactory) *Config {
 		EnableIndex:                  true,
 		EnableDiscovery:              true,
 		EnableProfiling:              true,
+		EnableMetrics:                true,
 		MaxRequestsInFlight:          400,
 		MaxMutatingRequestsInFlight:  200,
 		RequestTimeout:               time.Duration(60) * time.Second,

pkg/server/config_test.go

@@ -109,6 +109,7 @@ func TestNewWithDelegate(t *testing.T) {
     "/healthz/poststarthook/generic-apiserver-start-informers",
     "/healthz/poststarthook/wrapping-post-start-hook",
     "/healthz/wrapping-health",
+    "/metrics",
     "/swaggerapi"
   ]
 }`, t)