The seventh-ranked Northeastern University Huskies’ bid for a fourth straight Beanpot championship ended in a dogfight with the Boston University Terriers at Walter Brown Arena Tuesday night. The underdog Terriers knocked out Northeastern 2-1, on an overtime power-play goal by BU’s Maeve Carey in the semifinal round of the 47th Annual Dunkin’ Women’s Beanpot. “Congrats to BU, hard-fought win,” said Northeastern head coach Dave Flint. “I think we gave fans an exciting game to watch.