LINCOLN, Neb. — The developer of the Keystone XL oil pipeline made good on its promise Tuesday to try to seize access to the Nebraska land it needs to finish the project — the first steps it’s taken since the state’s high court removed a major legal barrier. TransCanada employees said the company filed legal papers in nine Nebraska counties to invoke eminent domain for the land that’s needed to construct, operate and maintain the pipeline. The filings come just before the company’s …