The Ottawa Senators’ stars are more focused on the win column than the score sheet. Jason Spezza scored a power-play goal for his 300th NHL point and Dany Heatley had two assists to reach 50 points this season, leading Ottawa to a 5-2 win over the New York Islanders on Thursday night. Spezza collected a souvenir for his father after he earned his milestone point in his 277th regular-season game…