Added VC reference and MapUtil tests.

Change-Id: I2892044b1efdc7fe0fa2aca74f65da3f580f77d5
diff --git a/core/Changes b/core/Changes
index 29195ff..5b04a5e 100644
--- a/core/Changes
+++ b/core/Changes
@@ -16,6 +16,8 @@
    - Removed codes related to user registration & password management (margaretha)  
 22/01/2019
    - Added create, edit, retrieve user default setting controllers (margaretha)
+24/01/2019
+   - Added default setting key validation & fixed UserdataTest (margaretha)   
 
 
 version 0.61.4