CHICAGO — The Mets could not have taken Game 1 of a doubleheader at Wrigley Field without J.D. Davis, who can pick it. In the bottom of the 10th inning of a tied game, Adam Ottavino had the pressure turned up when Frank Schwindel, the Cubs’ free runner at second, stole third. Ottavino, who was pitching a second straight inning, understood the assignment: a deep fly to the outfield would walk it off for the Cubs. With a killer instinct, he struck out his first two batters using nine pitches combined. “Once a guy is on third, you have to give it everything you got there,” said Ottavino, who lean…