One of the world’s most decorated Olympians is living quietly in Israel, a country that just wrapped up its participation in the world competition without a single medal.  Agnes Keleti, 91 now, won 10 Olympic medals in gymnastics, including five golds, for Hungary in the 1950s before defecting and emigrating to Israel.  That was just one chapter of her unusual life. Her Olympic heroics began when she was already at an age when most athletes have hung up their shoes — because she spent her prime sporting years escaping the Nazis during World War II.  Now living in an apartment near the beach in the coastal city of Herzliya, north of Tel Aviv, the retired gymnastics coach is still physically fit but has trouble recalling details of her Olympic heyday.