By Jonathan Stempel NEW YORK (Reuters) – Two British men have been charged by federal prosecutors in New York with defrauding people into investing nearly $100 million in loans supposedly backed by an inventory of expensive wine that did not actually exist. According to a grand jury indictment announced on Tuesday, Stephen Burton and James Wellesley induced people to invest in loans supposedly brokered by their company Bordeaux Cellars and collateralized by wine they stored for wealthy collectors. Bordeaux Cellars allegedly had custody of thousands fewer wines than loan documents reflected, in…