AWS S3 playground for James EJ to work on gitlab-org/gitlab-ee#2841

What

Access to somewhere I can play with S3

Why

So I can experiment with S3 storage for gitlab-org/gitlab-ee#2841

Related

@ayufan What did you use for https://gitlab.com/gitlab-org/gitlab-ee/issues/2965?
@zj What did you use for https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1762?
@nick.thomas Did you set up AWS for https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1305?