The triple-cheeseburger at Boris Diaw and Ronny Turiaf’s restaurant in Paris. PARIS — When one is uncredentialed for the Olympics, yet in Europe anyway, and there is a France-US opener, where is the next best place to be? Among the French, of course. That is what brought me Sunday to a sports bar in the 19th district, a spiffy place partly-owned by Boris Diaw and Ronny Turiaf, and I do believe I may have found the secret to Boris’ big