In https://github.com/openshift/origin/pull/23811/commits/befc02022de04a47bfef81d7955ff5b98600485a we disabled explain tests, we need them back.
This is waiting for the new schema generator.
FYI, this BZ will fix the schema generator https://bugzilla.redhat.com/show_bug.cgi?id=1754640
Fix in https://github.com/openshift/origin/pull/23935