ATLANTA — Chicago Cubs manager David Ross has the luxury of options in big moments. Wednesday night was veteran reliever David Robertson’s turn to get out of a tough spot with the game on the line. With the score tied at 3 in the eighth, the Cubs brought in Robertson to face Atlanta Braves second baseman Ozzie Albies with two outs and runners on second and third. Robertson needed only three pitches to induce an inning-ending groundout. Robertson’s stellar start to the year continued when he came back out for the ninth to strike out the Braves’ best three power hitters. The shutdown inning set …