Specify the correct kafka service

Change-Id: Id5fce18cca65a72d1ec4330855b595631c5f32af
diff --git a/configs/seba-ponsim-voltha-1.6.yaml b/configs/seba-ponsim-voltha-1.6.yaml
index 6999306..b764dda 100644
--- a/configs/seba-ponsim-voltha-1.6.yaml
+++ b/configs/seba-ponsim-voltha-1.6.yaml
@@ -41,3 +41,8 @@
     tag: "voltha-1.6"
   rg:
     tag: "voltha-1.6"
+
+# in workflow/att-workflow service chart
+att-workflow-driver:
+  # this is mandatory, it's needed to correctly configure the kafka endpoint
+  kafkaService: cord-kafka