adding "all-branches-regexp". needed for repos with support branches

Change-Id: Iac9dba822143b49cbdc38f98619021e985dfaed7
diff --git a/jjb/verify/att-workflow-driver.yaml b/jjb/verify/att-workflow-driver.yaml
index f5ec604..0c915f2 100644
--- a/jjb/verify/att-workflow-driver.yaml
+++ b/jjb/verify/att-workflow-driver.yaml
@@ -7,7 +7,7 @@
 
     jobs:
       - 'verify-att-workflow-driver-jobs':
-          branch-regexp: '{supported-branches-regexp}'
+          branch-regexp: '{all-branches-regexp}'
 
 - job-group:
     name: 'verify-att-workflow-driver-jobs'