BUDAPEST, Hungary (AP) — Although she turned 99 on Thursday, even a 9-year-old would have a hard time keeping up with Agnes Kele-ti’s irrepressible energy and enthusiasm. Keleti is the oldest living Olympic champion and a Holocaust survivor. She won 10 medals in gymnastics — including five golds — at the 1952 Helsinki Games and at the 1956 Melbourne Games. Still, speaking on the eve of her…