A heroine named Katniss proved to be catnip to the nation’s moviegoers this weekend, as “The Hunger Games: Mockingjay, Part 2” opened with $101 million in ticket sales. But the second installment in the Hunger Games franchise failed to equal the blockbuster power of its predecessor, “Mockingjay, Part 1,” which opened at $121.9 million, according to […]