ROME (Reuters) - Italy's largest trade union is expected to outline on Wednesday how it will try to stop a reform making it easier to fire workers that Prime Minister Mario Monti says is vital for getting the economy back on track. Monti is pushing ahead with the deep overhaul of job protection laws after failing to reach a deal in talks with unions and employers on Tuesday despite the promise from the left-wing CGIL union to do everything to block the change. Bosses complain Italy's labor laws make it hard to get rid of workers, discouraging hiring and foreign investment. ...