point the users to PKI-related logs when CA configuration fails
    
    This patch adds an error handler which prints out the paths to logs related to
    configuration and installation of Dogtag/CA in the case of failure.
    
    https://fedorahosted.org/freeipa/ticket/4900
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>