Tests: ID views tests do not recognize ipakrboktoauthasdelegate sttribute
    
    Due to implementation of [1], new attribute 'ipakrboktoauthasdelegate' was presented, but is not recognized by ID views tests, thus causing them to fail.
    
    [1] https://fedorahosted.org/freeipa/ticket/5764
    
    https://fedorahosted.org/freeipa/ticket/6241
    
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>