Setting default kafka URL for macro-charts

Change-Id: I54e37412c66a15d8d673d25a21cef641407620e9
diff --git a/workflows/att-workflow/values.yaml b/workflows/att-workflow/values.yaml
index 730219b..52d1556 100644
--- a/workflows/att-workflow/values.yaml
+++ b/workflows/att-workflow/values.yaml
@@ -30,5 +30,8 @@
 global:
   registry: ""
 
+att-workflow-driver:
+  kafkaService: "cord-platform-kafka"
+
 xosAdminUser: "admin@opencord.org"
 xosAdminPassword: "letmein"