bugfix separated files

cluster/addons/metadata-agent/stackdriver/podsecuritypolicies/metadata-agent-rbac.yaml

 apiVersion: rbac.authorization.k8s.io/v1
-kind: ClusterRole
-metadata:
-  name: stackdriver:metadata-agent
-  labels:
-    kubernetes.io/cluster-service: "true"
-    addonmanager.kubernetes.io/mode: Reconcile
-rules:
-- apiGroups:
-  - ""
-  - "apps"
-  - "extensions"
-  resources:
-  - "*"
-  verbs:
-  - watch
-  - get
-  - list
----
-apiVersion: rbac.authorization.k8s.io/v1
-kind: ClusterRoleBinding
-metadata:
-  name: stackdriver:metadata-agent
-  labels:
-    kubernetes.io/cluster-service: "true"
-    addonmanager.kubernetes.io/mode: Reconcile
-roleRef:
-  apiGroup: rbac.authorization.k8s.io
-  kind: ClusterRole
-  name: stackdriver:metadata-agent
-subjects:
-- kind: ServiceAccount
-  name: metadata-agent
-  namespace: kube-system
----
-apiVersion: rbac.authorization.k8s.io/v1
 kind: RoleBinding
 metadata:
   name: gce:podsecuritypolicy:metadata-agent