Moving yang files to /models/l3vpn.

Change-Id: I09ef1d727ea638abcd7652f09d42127c9c16c79e
diff --git a/apps/yang/src/main/java/org/onosproject/yang/YangRuntimeManager.java b/apps/yang/src/main/java/org/onosproject/yang/YangRuntimeManager.java
index b1867f6..9c737b5 100644
--- a/apps/yang/src/main/java/org/onosproject/yang/YangRuntimeManager.java
+++ b/apps/yang/src/main/java/org/onosproject/yang/YangRuntimeManager.java
@@ -110,6 +110,8 @@
 
     @Override
     public void registerSerializer(YangSerializer ys) {
+        //FIXME: Allow re-registration of model with additional service end
+        // points.
         serializerRegistry.registerSerializer(ys);
     }