PITTSBURGH — The Islanders spent much of Thursday night looking like they were moving into a new era with both feet. Ultimately, though, it was old habits that doomed them to a 4-3 loss to the Penguins in their first game of the season. The penalty kill, a point of emphasis all preseason, coughed up a pair of goals and the Islanders gave up a third-period winner to Justin Brazeau after leaving Ilya Sorokin out to dry in the final 20 minutes, overshadowing all the positivity that came with