pylint: disable __hash__ for some classes
    
    pylint requires all classes implementing __eq__ to also implement
    __hash__. We disable hashing for the classes that miss the ability,
    should they ever be required to use it, it can be implemented then.
    
    https://pagure.io/freeipa/issue/6874
    
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>