YANG uses and UT

Change-Id: Id3ec5cfed2b8e2a7d2d580786c70b5804f03ecfa
diff --git a/src/test/resources/SelfResolutionGroupingHavingSameUsesManyTimes.yang b/src/test/resources/SelfResolutionGroupingHavingSameUsesManyTimes.yang
new file mode 100644
index 0000000..d449adf
--- /dev/null
+++ b/src/test/resources/SelfResolutionGroupingHavingSameUsesManyTimes.yang
@@ -0,0 +1,25 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container valid {
+    	grouping endpoint {
+             leaf zip-code {
+                 type string;
+             }
+             uses failure;
+	     container hold {
+                 leaf newone {
+                     type string;
+                 }
+                 
+             }
+             uses failure;              
+    	}
+        grouping failure {
+            leaf test {
+                type string;
+            }
+        }
+    }
+}