Adding a small hack to allow resolving model specific resources against the class-loader of the model.

Change-Id: I01aef3b4f1b2c0bd9101f66125e860ab615eb672
diff --git a/apps/yang/src/main/java/org/onosproject/yang/YangClassLoaderRegistry.java b/apps/yang/src/main/java/org/onosproject/yang/YangClassLoaderRegistry.java
index 7198346..321aa72 100644
--- a/apps/yang/src/main/java/org/onosproject/yang/YangClassLoaderRegistry.java
+++ b/apps/yang/src/main/java/org/onosproject/yang/YangClassLoaderRegistry.java
@@ -20,7 +20,9 @@
 
 /**
  * Auxiliary mechanism for resolving model IDs into class-loaders from where
- * the model was registered.
+ * the model was registered to allow access to model-specific resources.
+ *
+ * Note: Consider promoting this to ONOS YANG Tools repo.
  */
 @Beta
 public interface YangClassLoaderRegistry {