Incorrect response when PUTing an existing bucket

[Darryl Tam]

When attempting to create an existing bucket on top of an existing one, Swift3 returns a BucketAlreadyExists error. This error would be valid if it was owned by another user, but since there's a single user, it's not the correct response here.

S3 has two possible correct responses:

In US Standard, bucket creation is idempotent. Therefore, it is expected that the response be a 200 OK.

In all other regions a 409 BucketAlreadyOwnedByYou error is returned.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Tim Burke (<email address hidden>) on branch: master
Review: https://review.openstack.org/409300
Reason: Submitted against s3api as https://review.openstack.org/#/c/575829/

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/swift 2.20.0 release.