Ignore the COMPLETED notifications from jenkins
    
    Jenkins sends three types of notifications: STARTED, COMPLETED and
    FINALIZED.
    In order to avoid duplicating flags, we want to discard the COMPLETED
    notifications and only act on STARTED and FINALIZED.
    
    Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr></pingou@pingoured.fr>