CLEVELAND — LeBron James shook off an atrocious shooting start and withstood Atlanta’s gritty comeback to record a triple-double, and the Cleveland Cavaliers moved within one win of the NBA Finals by beating the Hawks 114-111 in overtime on Sunday night to take a 3-0 series lead. James missed his first 10 shots, but finished with 37 points, 18 rebounds and 13 assists. The Cavs needed every single one of them to hold off the top-seeded Hawks, who fought Cleveland until the final seconds despite being without injured shooter Kyle Korver and losing Al Horford, who was ejected in the first half.