Comment 4 for bug 1821925

OK for the general tracking list feedback, let's scale down to filtering that volume test (not likely to be fixe in EM branches): if you set the logstash request in initial comment to 7d ago (aka first week of April), you will see around 60 hits failing on ocata (and 40-50 on pike, but that is another subject).

I have a tentative review to filter out this test in ocata branch, will update here (last approved cherry-picks on ocata are on recheck because of that test)