VOL-1283: Fixed callback execution consistency for all proxy levels

- Callbacks are executed at any proxy levels
- Uncovered some issues with the base children fields structure
- cleaned up the root/node structures
- Ensure that a get command returns a clone.

Change-Id: Ic2cd5420c29332bd9b5d6f303a7fd9d0d0ccaf06
diff --git a/db/model/model.go b/db/model/model.go
index 2b95280..1312a41 100644
--- a/db/model/model.go
+++ b/db/model/model.go
@@ -20,6 +20,6 @@
 )
 
 func init() {
-	log.AddPackage(log.JSON, log.WarnLevel, log.Fields{"instanceId": "DB_MODEL"})
+	log.AddPackage(log.JSON, log.DebugLevel, log.Fields{"instanceId": "DB_MODEL"})
 	defer log.CleanUp()
 }