Updated openstack/openstack
Project: openstack/swift  4afa305e4fd181463005b0cddc53696f413b93f1

Splice: Use `operator.or_` instead of a lambda-expression

Suggested by Samuel Merritt in https://review.openstack.org/#/c/135319/

Change-Id: I5b86f25b42ffa6d4f9626dc6eb207ae0425933a8