[ONOS-4636]YANG Grouping linking bug fix + YANG Code review comment fix

Change-Id: I68ee8dd08266a02593e217cef1a9bb010037d673
(cherry picked from commit 2ee9e7e892456543e0e5532f7b0de3774d42e561)
diff --git a/utils/yangutils/src/test/resources/groupingNodeSameAsModule/portpair.yang b/utils/yangutils/src/test/resources/groupingNodeSameAsModule/portpair.yang
new file mode 100644
index 0000000..3497f04
--- /dev/null
+++ b/utils/yangutils/src/test/resources/groupingNodeSameAsModule/portpair.yang
@@ -0,0 +1,29 @@
+module port-pair {
+
+    yang-version 1;
+
+    namespace "sfc.portpair";
+
+    prefix "port-pair";
+   
+     grouping port-pair {
+        container  port-pair {
+
+        	leaf name {
+           	    type string;
+        	}
+
+        	
+        	leaf description {
+            	    type string;
+        	}
+
+   	}
+    }
+   
+    rpc get-port-pair {
+      output {
+          uses port-pair;
+      }
+    }
+}