Don't require junit test results for mcast repo

Change-Id: Ifa5d273868cc3ba1feb6516be1a9a3c1996d1f65
diff --git a/jjb/verify/mcast.yaml b/jjb/verify/mcast.yaml
index be99a4d..329e415 100644
--- a/jjb/verify/mcast.yaml
+++ b/jjb/verify/mcast.yaml
@@ -16,6 +16,7 @@
           branch-regexp: '^(mcast-1.4)$'
           jdk-distribution: 'java-1.8.0-amazon-corretto'
           name-extension: '-jdk8'
+          junit-allow-empty-results: true
 
 - job-group:
     name: 'mcast-jobs-common'