fix small bug

4 jobs for !577 with dfazzini_add_pre_event_filters in 41 seconds
detached
Status Name Job ID Coverage
  Test
passed check-copyright #16933894

00:00:21

passed check-formatting #16933895

00:00:41

passed python-linting #16933896
cvmfs

00:00:27

 
  .Post
manual update-references #16933897
allowed to fail manual