By Maria Kiselyova MOSCOW (Reuters) – Mail.Ru Group , majority-owned by Russias richest man Alisher Usmanov, has resolved a shareholder dispute over the countrys biggest social network VKontakte (VK), buying out a rival co-investor for $1.47 billion. The deal could clear the way for a revival of plans for a stock market listing of VKontakte, scrapped in 2012 because of poor market conditions. VK, known as Russias answer to Facebook , has been the focus of an ownership battle since April 2013 when investment fund United Capital Partners (UCP) bought a 48 percent stake. …