[all] Aborting Incomplete Multipart Uploads Using a Bucket Lifecycle Policy

[mocchira]

Found through the discussion on https://github.com/leo-project/leofs/issues/722#issuecomment-301007144. It would be useful for anyone using LeoFS with the multipart upload to avoid unintentional disk uses.

Reference: http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuoverview.html#mpu-abort-incomplete-mpu-lifecycle-config