NEW ORLEANS — Relatives of New Orleans Saints and Pelicans owner Tom Benson have filed a lawsuit opposing their ouster from ownership positions on the teams. Benson’s daughter, Renee, and her two children allege in Thursday’s lawsuit that Tom Benson’s physical and mental health are failing — asserting that he recently answered “Ronald Reagan” when asked to identify the current U.S. president — and he’s being manipulated by his wife of 10 years. The lawsuit was …