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

Change-Id: Id1f3ac9c90a632373f51cc75d499c3110216be17
diff --git a/utils/yangutils/plugin/src/test/resources/xPathLinker/InterFile/InterSingleUses/test1.yang b/utils/yangutils/plugin/src/test/resources/xPathLinker/InterFile/InterSingleUses/test1.yang
new file mode 100644
index 0000000..fbc3bcb
--- /dev/null
+++ b/utils/yangutils/plugin/src/test/resources/xPathLinker/InterFile/InterSingleUses/test1.yang
@@ -0,0 +1,42 @@
+submodule test1 {  
+
+    belongs-to test {
+         prefix test;
+    }           
+    
+    import test2 {
+       prefix test2;
+    }
+    organization "";  
+    contact "";  
+       
+    description   
+        "Defines basic service types for L3VPN service.";  
+       
+    revision "2015-12-16" {  
+        reference "";  
+    }  
+
+
+    grouping group1 {
+        container cont1 {
+           container cont2 {
+               leaf a {
+                  type string;
+               }
+           }
+        }
+    }
+
+    augment /test2:cont1/test2:cont2 {
+       leaf a {
+          type int32;
+       }
+       container cont2 {
+          leaf leaf1 {
+             type int32;
+          }
+       }
+    }
+}
+