luci-scheduler: Update to allow others to trigger builds

BUG=chromium:859310
TEST=none

Change-Id: I3d1a249235db348f67f3aedc2ee726c932cb5195
Reviewed-on: https://chromium-review.googlesource.com/1290112
Commit-Ready: Jason Clinton <jclinton@chromium.org>
Tested-by: Jason Clinton <jclinton@chromium.org>
Reviewed-by: Vadim Shtayura <vadimsh@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Reviewed-by: Mike Nichols <mikenichols@chromium.org>
diff --git a/scripts/gen_luci_scheduler_unittest.py b/scripts/gen_luci_scheduler_unittest.py
index 1185d90..181cb15 100644
--- a/scripts/gen_luci_scheduler_unittest.py
+++ b/scripts/gen_luci_scheduler_unittest.py
@@ -282,6 +282,10 @@
     role: OWNER
     granted_to: "group:project-chromeos-admins"
   }
+  acls {
+    role: TRIGGERER
+    granted_to: "group:mdb/chromeos-build-access"
+  }
 }
 
 trigger {