Don't delete s3 etcdsnapshotfiles if they are missing from s3 but less than a minute old, its possible the other node just finished uploading it and the object key has not yet become visible.
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
(cherry picked from commit 0826ebc1)
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>