namespace: adding namespace to all rook-ceph namespaces references

To make it easier for the user to switch to a namespace other than the
default 'rook-ceph', the tag '# namespace:cluster' must be inserted in
all the places where this namespace is used. This way, a simple 'sed'
command can update all the Yaml files to the new namespace.

Signed-off-by: Redouane Kachach <rkachach@redhat.com>
(cherry picked from commit ff081cc4ae)

deploy/examples/dashboard-external-https.yaml

@@ -15,6 +15,6 @@ spec:
   selector:
     app: rook-ceph-mgr
     mgr_role: active
-    rook_cluster: rook-ceph
+    rook_cluster: rook-ceph # namespace:cluster
   sessionAffinity: None
   type: NodePort