variable name change

Author: Tanishka Jain

server/src/main/java/org/cloudfoundry/identity/uaa/provider/saml/UserAttributeChangesSnsHandler.java

@@ -188,7 +188,7 @@ private Map<String, Object> createUserEventMessage(UaaUser user, Map<String, Obj
         message.put("username", user.getUsername());
 
         // Include identity zone ID
-        message.put("identityZoneId", user.getZoneId());
+        message.put("instanceZoneId", user.getZoneId());
 
         // Add only the changed fields
         message.put("changedFields", changedFields);