bucketName always referred to the main bucket name, despite it only being used in error messages. Refactor HubS3Client to not hold on to a bucket name, as this leads to invalid and confusing errors when the error
actually happens elsewhere (like the DR bucket).
bucketNamealways referred to the main bucket name, despite it only being used in error messages. Refactor HubS3Client to not hold on to a bucket name, as this leads to invalid and confusing errors when the error actually happens elsewhere (like the DR bucket).No functional change expected.