American business titan John D. Rockefeller once quipped, “A friendship founded on business is a good deal better than a business founded on friendship.” Following the Post’s in-depth look at the negotiations between the District and the Lerner Group over the direction of the new stadium’s construction and development in surrounding Anacostia, it seems D.C. might have put too much faith in the Lerners’ friendship. When the city inked the sale of the Nationals to…