YANG sub module linking + unsupported yang construct + defect fix

Change-Id: I224c8c14ee2111f6844278cb540c48651544f59b
diff --git a/src/test/resources/ValidNotificationStatement.yang b/src/test/resources/ValidNotificationStatement.yang
index 072df23..7e6bc17 100644
--- a/src/test/resources/ValidNotificationStatement.yang
+++ b/src/test/resources/ValidNotificationStatement.yang
@@ -14,9 +14,7 @@
            type int32;
         }
         leaf if-name {
-           type leafref {
-               path "/interface/name";
-           }
+           type leafref;
         }
         leaf if-admin-status {
            type P:admin-status;