using different openolt version for voltha16 branch

Change-Id: I98a69b94ec598fc2198510dbdf2b7e004bf4e848
diff --git a/jjb/cord-test/att-workflow.yaml b/jjb/cord-test/att-workflow.yaml
index d15d758..8c1ba80 100644
--- a/jjb/cord-test/att-workflow.yaml
+++ b/jjb/cord-test/att-workflow.yaml
@@ -44,7 +44,7 @@
          profile: 'att-workflow'
          branch: 'cord-6.1'
          Jenkinsfile: 'Jenkinsfile-attworkflow-build'
-         oltDebVersion: 'openolt-master.deb'
+         oltDebVersion: 'openolt-master-voltha16.deb'
          configurePod: true
          time: '5'