[ONOS-4799],[ONOS-4351] Augment inter file linker and Generated Code refactored.

Change-Id: Id1f3ac9c90a632373f51cc75d499c3110216be17
diff --git a/plugin/src/test/resources/xPathLinker/InterFile/InterSingleSubModule/test.yang b/plugin/src/test/resources/xPathLinker/InterFile/InterSingleSubModule/test.yang
new file mode 100644
index 0000000..a8340ab
--- /dev/null
+++ b/plugin/src/test/resources/xPathLinker/InterFile/InterSingleSubModule/test.yang
@@ -0,0 +1,27 @@
+module test {  
+    namespace "xpath:intra:single";  
+    prefix test ;  
+    
+    import test2 {
+       prefix test2;
+    }
+   
+    include test1;
+
+    organization "";  
+    contact "";  
+       
+    description   
+        "Defines basic service types for L3VPN service.";  
+       
+    revision "2015-12-16" {  
+        reference "";  
+    }  
+
+    augment /test2:cont1/test2:cont2/cont2 {
+       leaf a {
+          type int32;
+       }
+    }
+}
+