This checks to see if the common prefix is before the marker and
thus would have been returned in earlier list objects request.
The error case was aws cli listing multiple entries for the same
common prefix when the listing required multiple pagination
requests.
Fixes#778
Changed ListObjectsV2 and ListObjects actions return types from
*s3.ListObjects(V2)Output to s3response.ListObjects(V2)Result.
Changed the listing objects timestamp to RFC3339 to match AWS
S3 objects timestamp.
Fixes#752
For large directories, the treewalk can take longer than the
client request timeout. If the client times out the request
then we need to stop walking the filesystem and just return
the context error.
This should prevent the gateway from consuming system resources
uneccessarily after an incoming request is terminated.
