SUNRISE, Fla. — The young children are scurrying about the carpeted BB&T Center floor, dropping water bottles onto tables and putting the finishing touches on preparations for the 2015 NHL draft. The telephones are wired, the placards placed and the center-stage screen updated to include Friday night’s first and second major trades, both coming from a now-blown-up Boston: Defenseman Dougie Hamilton to Calgary in exchange for the Nos. 15, 45 and 52 overall picks, the last of which originated from the Washington Capitals in their Curtis Glencross deal at the deadline, and forward Milan Lucic to Los Angeles in exchange for No.