YANG uses and UT

Change-Id: Id3ec5cfed2b8e2a7d2d580786c70b5804f03ecfa
diff --git a/utils/yangutils/src/test/resources/SelfFileLinkingWithGroupingHierarchicalRefUnresolved.yang b/utils/yangutils/src/test/resources/SelfFileLinkingWithGroupingHierarchicalRefUnresolved.yang
new file mode 100644
index 0000000..cd71621
--- /dev/null
+++ b/utils/yangutils/src/test/resources/SelfFileLinkingWithGroupingHierarchicalRefUnresolved.yang
@@ -0,0 +1,14 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    import ietf-yang-types {
+        prefix "P";
+    }
+    grouping create {
+        uses P:valid;
+    }
+    container test{
+        uses create;
+    }
+}