By Tom Balmforth and Max Hunder KYIV (Reuters) -Russia said it had taken full control of the eastern Ukrainian region of Luhansk on Sunday after capturing the final Ukrainian bastion of Lysychansk, the city where Kyiv said it had withdrawn to save the lives of its troops. The region’s capture, a major Russian war aim, is a political victory for the Kremlin after weeks of grinding advances and shifts the battlefield focus to neighbouring Donetsk region, where Kyiv still controls swathes of territory. Since abandoning an assault on the capital Kyiv, Russia has concentrated its military operation…