Ignore invalid messages sent by the CI system
    
    We have recently ran into at least two messages sent by the CI
    system that did not conform to the specifications and thus breaking
    toddlers.
    These two messages are:
    https://apps.fedoraproject.org/datagrepper/id?is_raw=true&size=extra-large&id=2020-7ae2f4fd-98a1-4c3b-9c43-f966f4699776
    and
    https://apps.fedoraproject.org/datagrepper/id?is_raw=true&size=extra-large&id=2020-fbb9e244-0ab4-4cf1-b5cc-d9a8485a5e84
    
    So we'll be ignoring them but still log it so we can potentially
    figure out what happened.
    
    Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>