[ONOS-5178] Defect fix :No get/set for root node in generated service

Change-Id: I9d90068e4cdd3d35a9ee71fd1f00c4a635b191b7
diff --git a/plugin/src/test/resources/rootNode/onlygrouping/module.yang b/plugin/src/test/resources/rootNode/onlygrouping/module.yang
new file mode 100644
index 0000000..1c4637c
--- /dev/null
+++ b/plugin/src/test/resources/rootNode/onlygrouping/module.yang
@@ -0,0 +1,18 @@
+module test5 {
+    namespace "test5:test";
+    prefix test ;
+
+    revision "2016-07-04" {
+             description "Initial revision.";
+    }
+    typedef typedef1 {
+       type int32;
+    }
+    typedef typedef2 {
+       type int32;
+    }
+    typedef typedef3 {
+       type int32;
+    }
+
+}