Include all possible problematic rules in the problem description.
    
    When rpmdeplint finds problem, it currently only prints the top-level
    problem. This in the most cases does not provide enough details to
    successfully debug the situation.
    
    In this commit, the rpmdeplint prints all the problematic RPM rules
    leading to a problem, providing much more details.
    
    Signed-off-by: Jan Kaluza <jkaluza@redhat.com>