(Reuters) - MGM Resorts International's Chief Operating Officer and President Bill Hornbuckle has been named acting CEO and president as the U.S. casino industry confronts the coronavirus crisis.Chief Executive and Chairman Jim Murren is stepping down prior to the expiration of his contract in light of the crisis. Paul Salem, who currently is a board member, will be made its chair, the company said on Sunday.Murren vacated the position as of Sunday, the statement added. The company said last..