Holding tanks are seen at Colonial Pipeline’s Charlotte Airport Delivery Facility in Charlotte, North Carolina, U.S. an undated photograph.Colonial Pipeline | via ReutersThe cyberattack that forced the shutdown of the country’s largest refined fuel-products pipeline over the weekend has sparked some routing changes for American Airlines as it seeks to conserve fuel at its second-busiest hub.Colonial Pipeline Co., which operates the more than 5,500-mile pipeline from Houston, Texas to Linden, New Jersey, said it has a goal of restoring operational service by the end of the week, but said the process would be gradual. The pipeline directly services …