YANG uses and UT

Change-Id: Id3ec5cfed2b8e2a7d2d580786c70b5804f03ecfa
diff --git a/utils/yangutils/src/test/resources/UsesInModule.yang b/utils/yangutils/src/test/resources/UsesInModule.yang
index a0a05f4..02b9f09 100644
--- a/utils/yangutils/src/test/resources/UsesInModule.yang
+++ b/utils/yangutils/src/test/resources/UsesInModule.yang
@@ -2,5 +2,7 @@
     yang-version 1;
     namespace http://huawei.com;
     prefix Ant;
+    grouping endpoint {
+    }
     uses endpoint;
 }