add xds samples deploy Namespace.yml (#512)

* add xds samples deploy Namespace.yml

* add xds samples deploy Namespace.yml
diff --git a/dubbo-samples-xds/deploy/Namespace.yml b/dubbo-samples-xds/deploy/Namespace.yml
new file mode 100644
index 0000000..9816fb9
--- /dev/null
+++ b/dubbo-samples-xds/deploy/Namespace.yml
@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: dubbo-demo
\ No newline at end of file