Prefix the generated data downloads/exports

[patphongs]

What we're after:
To better organize and target objects in the bulk downloads bucket, we should put the user generated data downloads/exports into a prefix.

This would also allow us to set a lifecycle policy to not retain versions in s3 of the deleted files.

Prefix name: user-downloads

Completion criteria:

• Prefix the files, without affecting the file name the user sees when downloading
• Ask cloud.gov to set a one or zero day version lifecycle policy for this prefix.
• Ask cloud.gov to remove the blanket lifecycle policy on the downloads bucket

[lbeaufort]

Until this is implemented, there is a small risk that we’d lose ES backups and archived murs if we deleted them and didn’t notice for 30 days (unlikely) but I think we can accept that risk for a sprint - moving to 13.2 per @patphongs

[lbeaufort]

Still need to follow up with cloud.gov, so reopening @patphongs. Changes go into production on 8/25.

[patphongs]

Moved this to 13.3 as the request will be sent to cloud.gov after our deploy today.

[patphongs]

Email request sent to cloud.gov

[patphongs]

This request has been completed by cloud.gov.