Terry Collins confirmed yesterday that super-utility player Anthony Seratelli will not break camp with the Mets. Despite experience playing in both the outfield and middle infield, Seratelli hit only .213/.229/.277 in spring training, which hardly distinguished himself from the pack. Barring an external option emerging in short order, it appears Omar Quintanilla is the most likely candidate to make the Opening Day roster as a backup middle infielder, although Collins has been noncommittal about Quintanilla’s future role so far…