AFTER SECRET GROOM, 2 DIVORCES, RUDY WIFE SETS SIGHTS ON WHITE HOUSE IN 'HIDING': Jeffrey Ross, the first husband of Judith Giuliani, sneers at our fotog in a Tampa, Fla., parking lot. Judith Giuliani's "hidden husband" tried to go incognito as The Post caught up with him outside his girlfriend's Tampa home, refusing even to acknowledge his name....multiple sources, including former neighbors and a law-enforcement officer, confirmed his identity. Ross, 56, a bushy-mustached car lover, wore his hat backward and dark sunglasses when spotted leaving the Tampa home of his girlfriend in a convertible Mercedes with the license plate "N0...