[VOL-3892] Fix: workflow parameters was getting passed empty in ATT jobs

Change-Id: Ia5cb82adf8c2e692fa678997d52ad5b89355dde5
diff --git a/jjb/cord-test/voltha.yaml b/jjb/cord-test/voltha.yaml
index 60ef3cf..4c56478 100644
--- a/jjb/cord-test/voltha.yaml
+++ b/jjb/cord-test/voltha.yaml
@@ -10,7 +10,7 @@
 
     with-kind: false
     power-switch: False
-    work-flow: ''
+    work-flow: 'ATT'
     in-band-management: false
     num-of-openonu: '1'
     num-of-onos: '1'