Insiders say he is headed to rival firm Akin Gump Strauss Hauer & Feld and could wind up taking a sizable group of lobbyists with him.One person called it an ???open secret??? within Patton that Jonas is leaving for Akin, a firm that is second only to Patton Boggs in total lobbying revenue.Jonas works for a number of high-powered clients, including the American Ambulance Association, the American