Configure logging by default

this avoid to include service.kubernetes.logging in cluster model

Change-Id: I1b8c5c7f06e81f65ea4fd2147c15bac4be83959e
diff --git a/metadata/service/control/cluster.yml b/metadata/service/control/cluster.yml
index e411788..0965a11 100644
--- a/metadata/service/control/cluster.yml
+++ b/metadata/service/control/cluster.yml
@@ -1,5 +1,7 @@
 applications:
 - kubernetes
+classes:
+- service.kubernetes.logging
 parameters:
   kubernetes:
     control: