Disable new pylint checks
    
    New checks have been introduced in pylint 1.5 and many of them are not
    compatible with IPA code or produce false positives.
    
    Disable them all.
    
    Note: due older versions of pylint, new checks cannot be disabled
    locally, must be disabled globally.
    
    https://fedorahosted.org/freeipa/ticket/5615
    
    Reviewed-By: David Kupka <dkupka@redhat.com>