An age-old adage posits that anyone who represents themselves in court has a fool for a client. A Bronx landlord couple is learning that lesson the hard way. Had Alejandro and Rosa Quito retained an attorney before filing for bankruptcy in May, they may have been advised to pursue Chapter 11 instead of Chapter 7. Now, an upcoming auction could see the couple lose their property at 540 Concord Avenue in the Bronx’s Mott Haven