[CORD-3171]

Only run legacy jobs on legacy build system repos.

Change-Id: I8fea347a9e14f71ad8e7d095b59029f8efb5a4f9
diff --git a/jjb/verify/exampleservice.yaml b/jjb/verify/exampleservice.yaml
index 03fc5c9..d32af50 100644
--- a/jjb/verify/exampleservice.yaml
+++ b/jjb/verify/exampleservice.yaml
@@ -7,7 +7,7 @@
 
     jobs:
       - 'verify-exampleservice-jobs':
-          branch-regexp: '{supported-branches-regexp}'
+          branch-regexp: '{legacy-branches-regexp}'
 
 - job-group:
     name: 'verify-exampleservice-jobs'