renew agent: handle non-replicated certificates
    
    In addition to replicated certificates (Dogtag certificates, RA
    certificate), handle non-replicated certificates in
    dogtag-ipa-ca-renew-agent as well.
    
    https://fedorahosted.org/freeipa/ticket/5959
    
    Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>