kube-prometheus: put in kube-system

These manifests should live in kube-system; otherwise the label selector
won't work.

hack/cluster-monitoring/self-hosted-deploy

@@ -2,5 +2,5 @@
 
 hack/cluster-monitoring/deploy
 
-kubectl --namespace=kube-system apply -f manifests/k8s/self-hosted
+kubectl apply -f manifests/k8s/self-hosted
 

hack/cluster-monitoring/self-hosted-teardown

@@ -2,5 +2,5 @@
 
 hack/cluster-monitoring/teardown
 
-kubectl --namespace=kube-system delete -f manifests/k8s/self-hosted
+kubectl delete -f manifests/k8s/self-hosted
 

manifests/k8s/self-hosted/kube-controller-manager.yaml

 apiVersion: v1
 kind: Service
 metadata:
+  namespace: kube-system
   name: kube-controller-manager-prometheus-discovery
   labels:
     k8s-app: kube-controller-manager

manifests/k8s/self-hosted/kube-dns.yaml

 apiVersion: v1
 kind: Service
 metadata:
+  namespace: kube-system
   name: kube-dns-prometheus-discovery
   labels:
     k8s-app: kube-dns

manifests/k8s/self-hosted/kube-scheduler.yaml

 apiVersion: v1
 kind: Service
 metadata:
+  namespace: kube-system
   name: kube-scheduler-prometheus-discovery
   labels:
     k8s-app: kube-scheduler