YANG uses and UT

Change-Id: Id3ec5cfed2b8e2a7d2d580786c70b5804f03ecfa
diff --git a/utils/yangutils/src/test/resources/UsesInContainer.yang b/utils/yangutils/src/test/resources/UsesInContainer.yang
index 9fb5fbf..df52fd6 100644
--- a/utils/yangutils/src/test/resources/UsesInContainer.yang
+++ b/utils/yangutils/src/test/resources/UsesInContainer.yang
@@ -2,6 +2,8 @@
     yang-version 1;
     namespace http://huawei.com;
     prefix Ant;
+    grouping endpoint {
+    }
     container valid {
         uses endpoint {
             description "grouping under test";