fix(role_binding): use namespace lookup to build role bindings

!8

templates/RoleBinding-SpecificNamespaces-prometheus.yaml

@@ -1,7 +1,7 @@
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 items:
-{{ range .Values.nfc_monitoring.prometheus.monitor_namespaces }}
+{{ range $index, $namespace := (lookup "v1" "Namespace" "" "").items }}
 - apiVersion: rbac.authorization.k8s.io/v1
   kind: RoleBinding
   metadata:
@@ -12,7 +12,7 @@ items:
       app.kubernetes.io/managed-by: {{ $.Release.Service }}
       app.kubernetes.io/version: {{ $.Chart.Version }}
     name: prometheus-{{ $.Release.Name }}
-    namespace: {{ . | quote }}
+    namespace: {{ $namespace.metadata.name | quote }}
   roleRef:
     apiGroup: rbac.authorization.k8s.io
     kind: Role