A collective bargaining agreement requires a heavy equipment company and a union that represents certain company employees to resolve a dispute over sick leave through arbitration, a federal judge held.In a written opinion, U.S. District Judge Sharon Johnson Coleman granted summary judgment in favor of the International Union of Operating Engineers, Local 150, AFL-CIO in its lawsuit seeking to compel Roland Machinery Co. to arbitrate the union’s grievance.Local 150 maintains Roland violated a collective bargaining …