[ONOS-7302] UT for value namespace in identifier. JSON/XML serializer change for value ns.

Change-Id: Ia5e77c2af822455d36cd307a38c91ba6a28597cd
diff --git a/serializers/json/src/test/resources/id-test2.json b/serializers/json/src/test/resources/id-test2.json
new file mode 100644
index 0000000..296c4e9
--- /dev/null
+++ b/serializers/json/src/test/resources/id-test2.json
@@ -0,0 +1,5 @@
+{
+  "identity-test:con": {
+    "identity-test:interface": "physical"
+  }
+}
\ No newline at end of file