[ONOS-5527,ONOS-5529] process sub tree filtering in generted code changes.

Change-Id: I2b5562ee57d887c25f4a6b55cd25006e288563c0
diff --git a/plugin/maven/src/test/resources/identityTranslator/test.yang b/plugin/maven/src/test/resources/identityTranslator/test.yang
new file mode 100644
index 0000000..b8a3193
--- /dev/null
+++ b/plugin/maven/src/test/resources/identityTranslator/test.yang
@@ -0,0 +1,14 @@
+module IdentityInModule{
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix IdentityInModule;
+
+    identity ref-address-family {
+        reference "http://www.iana.org/assignments/address-family-numbers/address-family-numbers.xhtml#address-family-numbers-2";
+    }
+    leaf tunnel {
+        type identityref {
+            base ref-address-family;
+        }
+    }
+}
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