s3api middleware does not check pipeline config

[Alistair Coles]

s3api middleware config options imply that the wsgi pipeline will be checked for valid configuration when the s3api middleware loads [1]. This check is not in fact happening, regardless of the value of the auth_pipeline_check option.

[1] https://github.com/openstack/swift/blob/10d9a737d8d6e5fcc70a0be07df89a1fb57b9739/etc/proxy-server.conf-sample#L575-L581

[Alistair Coles (alistair-coles)]

To reproduce, start a proxy-server with a pipeline:

pipeline = s3api proxy-server

and observe that no exception is raised.

[Alistair Coles (alistair-coles)]

https://review.opendev.org/c/openstack/swift/+/771467

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/swift 2.27.0 release.