By  Kate Bartlett JOHANNESBURG, South Africa—Zimbabwean Olympic swimmer Kirsty Coventry has had an eventful career, from the pool, to parliament. The country’s former dictator, Robert Mugabe, called her “a golden girl,” while the man who deposed him in a coup — Emmerson “the Crocodile” Mnangagwa – appointed her his minister of sports. Now the 41-year-old…