James John Liautaud’s tight control of his Jimmy John’s sandwich shop empire doesn’t make him an employer under state and federal wage laws, a judge has ruled. In a written opinion Wednesday, U.S. District Judge Charles P. Kocoras did not rule on the merits of the allegation that Jimmy John’s misclassifies assistant store managers to avoid paying them overtime. But Kocoras held the plaintiffs in a class-action lawsuit may not pursue claims against Liautaud under the federal Fair Labor …