[ONOS-4563][ONOS-4564][ONOS-4551][ONOS-4538]defect fix

Change-Id: Ia3fe844e1e846d2e1d2c4359eefc815e7767aef9
diff --git a/utils/yangutils/src/test/resources/BitTypedefStatement.yang b/utils/yangutils/src/test/resources/BitTypedefStatement.yang
new file mode 100644
index 0000000..d3dc26a
--- /dev/null
+++ b/utils/yangutils/src/test/resources/BitTypedefStatement.yang
@@ -0,0 +1,18 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    typedef type15 { 
+        type bits {
+             bit disable-nagle {
+                 position 0;
+             }
+             bit auto-sense-speed {
+                 position 1;
+             }
+             bit Mb-only {
+                 position 2;
+             }
+         }
+    }
+}