The link https://github.com/battlecode/battlecode-scaffold/blob/master/README.md#uploading-your-playerin step three doesn't go anywhere (404) in the page http://www.battlecode.org/contestants/upload/
Our apologies; this is a link to the old scaffold. We will update the link.
Meanwhile, please use this link for instructions: https://github.com/battlecode/battlecode-scaffold-2017#uploading-your-player
This has been resolved.
Successful test upload. For some reason I wasn't trying to export using the gradle task and was attempting to export using eclipse tools. Doc saved the day.