VOL-1900 lint warning fixes db

Change-Id: Iaa4e5c271c9e1d7c8ebce1e13c7e723ea4762304
diff --git a/db/model/callback_type.go b/db/model/callback_type.go
index b530dee..796a6ce 100644
--- a/db/model/callback_type.go
+++ b/db/model/callback_type.go
@@ -21,14 +21,14 @@
 
 // Enumerated list of callback types
 const (
-	GET CallbackType = iota
-	PRE_UPDATE
-	POST_UPDATE
-	PRE_ADD
-	POST_ADD
-	PRE_REMOVE
-	POST_REMOVE
-	POST_LISTCHANGE
+	Get CallbackType = iota
+	PreUpdate
+	PostUpdate
+	PreAdd
+	PostAdd
+	PreRemove
+	PostRemove
+	PostListchange
 )
 
 var enumCallbackTypes = []string{