By Olga Yagova and Dmitry Zhdannikov MOSCOW/LONDON (Reuters) – Glencore has sold out of Russneft, capping two decades of investments which saw the Swiss commodities firm trading millions of barrels of the Russian group’s oil even as it witnessed some of Russia’s top corporate and political battles. The sale, which has been years in the works since Glencore saw a top management reshuffle, was executed in December 2021 and will close in the first half of 2022 pending regulatory approvals, Glencore said. Glencore sold its stake in Russneft, because it was no longer material to its business, CEO G…