Provisioning `host` user details being stored on the bucket

[devraj]

Describe the bug
s3cmd seems to set a header called x-amz-meta-s3cmd-attrs which stores the data of the node provisioning the files on onto the bucket.

This is a known issue and an insensible default.

To Reproduce
use s3cmd with the params in package.json

Expected behavior
The headers are never set

Additional context
Use these parameters to disable setting the header

--no-preserve-user
--no-preserve-group
--no-preserve-modified
--no-preserve-perms