The Washington Capitals aren’t the only organization in the National Hockey League celebrating the just-concluded season.Fueled by the league’s new supplier deal with Adidas and first expansion team in more than 18 years, sponsorship spending on the NHL and its 31 clubs grew 10.8 percent to $559.5 million in the 2017-2018 season, according to ESP research.The increase is more than double the 5.5 percent increase in the 2016-2017 season as well as the projected 4.9 percent increase in...