CURTIS PASHELKA The Mercury News OAKLAND – The Oakland A’s turned to the long ball to help end their season-long eight-game losing streak on Tuesday. J.D. Davis, Seth Brown, and Abraham Toro all homered, with Toro’s shot over the right field wall in the bottom of the eighth inning proving to be the difference in the A’s 5-4 win over the Colorado Rockies before an announced crowd of 4,005 at the…