With some of the top international soccer stars in the area for the World Cup, a barber in Waltham, Massachusetts, is getting them ready for the sport’s biggest stage. Barber Coco Fernandez, owner of Mobar, has built a reputation among elite athletes, becoming a trusted name for some of soccer’s biggest talents ahead of the tournament. “You know, we found the best,” French soccer star Désiré Doué said after a recent haircut. “I appreciate that, …