[ONOS-4616] grouping linker issues fixed and other defect fixed.

Change-Id: I1b23f9ed0293edbc2d551efe82982559eb916ede
diff --git a/utils/yangutils/src/test/resources/BitUnionStatement.yang b/utils/yangutils/src/test/resources/BitUnionStatement.yang
new file mode 100644
index 0000000..dd62eae
--- /dev/null
+++ b/utils/yangutils/src/test/resources/BitUnionStatement.yang
@@ -0,0 +1,20 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    leaf type15 { 
+        type union {
+            type bits {
+                bit disable-nagle {
+                    position 0;
+                }
+                bit auto-sense-speed {
+                    position 1;
+                }
+                bit Mb-only {
+                    position 2;
+                }
+            }
+        }
+    }
+}