glob results appear to be truncated when using s3 accessor

[casey-hillman]

While using glob() with the s3 accessor on a bucket with over 1500 objects the results are incomplete. Currently there are two folders in the bucket with over 1500 objects in them. If we add a folder at the bucket root level named "aaaaa" it shows up in the glob results. If we instead add a folder at the bucket root level named "zzzz" it does not show up in the glob results.