PHOTO (Duke athletics): Jake Bobo pulls in a pass from Gunnar Holmberg. By TOM SHANHAN DURHAM – Duke quarterback Gunnar Holmberg rolled to his left for some running room in Saturday night’s first scrimmage when he was tackled near the sideline. He said he was eager for some live action. “We wanted to make it as real as possible,” Holmberg said. “It’s still mid-August.  We were never live in the spring, so we might as well get some…