Configure logging by default

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

Change-Id: I1b8c5c7f06e81f65ea4fd2147c15bac4be83959e
diff --git a/metadata/service/pool/cluster.yml b/metadata/service/pool/cluster.yml
index 7c42e12..cdf145e 100644
--- a/metadata/service/pool/cluster.yml
+++ b/metadata/service/pool/cluster.yml
@@ -1,6 +1,7 @@
 applications:
 - kubernetes
 classes:
+- service.kubernetes.logging
 - service.kubernetes.support
 - service.kubernetes.common
 parameters: