Don't require junit results on device-management-interface repo

Change-Id: Ie25a6389d41162e0f8733c75bccf38e4eacd963a
diff --git a/jjb/verify/device-management-interface.yaml b/jjb/verify/device-management-interface.yaml
index 26964d5..431a70e 100644
--- a/jjb/verify/device-management-interface.yaml
+++ b/jjb/verify/device-management-interface.yaml
@@ -8,11 +8,11 @@
     jobs:
       - 'verify-device-management-interface-jobs':
           branch-regexp: '{all-branches-regexp}'
-          allow-empty-results: true
 
 - job-group:
     name: 'verify-device-management-interface-jobs'
     jobs:
       - 'verify-licensed'
       - 'tag-collision-reject'
-      - 'make-unit-test'
+      - 'make-unit-test':
+          junit-allow-empty-results: true