Support sending TAGGED, untagged traffic for cord-tester test case. (dhcp,etc.)

Change-Id: I6d71a23f9f824ef3d37ec12ba372902c35addb33
diff --git a/src/test/dhcpl2relay/dhcpl2relayTest.json b/src/test/dhcpl2relay/dhcpl2relayTest.json
index 105156a..1c72d60 100644
--- a/src/test/dhcpl2relay/dhcpl2relayTest.json
+++ b/src/test/dhcpl2relay/dhcpl2relayTest.json
@@ -1,7 +1,8 @@
 {
-    "VOLTHA_OLT_MAC": "00:0c:e2:31:12:00", 
-    "VOLTHA_HOST": "172.17.0.1", 
-    "VOLTHA_OLT_TYPE": "ponsim_olt", 
-    "VOLTHA_REST_PORT": 8882, 
+    "TAGGED_TRAFFIC" : false,
+    "VOLTHA_OLT_MAC": "00:0c:e2:31:12:00",
+    "VOLTHA_HOST": "172.17.0.1",
+    "VOLTHA_OLT_TYPE": "ponsim_olt",
+    "VOLTHA_REST_PORT": 8882,
     "VOLTHA_TEARDOWN": false
-}
\ No newline at end of file
+}