Update the OLT serial number of demo pod

Change-Id: If8a0595c3e23f64eaa13e343682bb03b987481af
diff --git a/tests/data/onf-demo-pod-openonugo-sadis-DT.json b/tests/data/onf-demo-pod-openonugo-sadis-DT.json
index 70a3480..6192cda 100644
--- a/tests/data/onf-demo-pod-openonugo-sadis-DT.json
+++ b/tests/data/onf-demo-pod-openonugo-sadis-DT.json
@@ -63,10 +63,10 @@
             }]
           },
           {
-            "id": "EC1904000654",
+            "id": "EC1721000216",
             "hardwareIdentifier": "aa:bb:cc:dd:ee:ff",
             "ipAddress": "10.192.20.206",
-            "nasId": "EC1904000654",
+            "nasId": "EC1721000216",
             "uplinkPort": 16777216
           }
         ]