* add s3 pass test_multipart_upload_size_too_small * refactor metric names * return ErrNoSuchUpload if empty parts * fix test
see https://blog.aqwari.net/xml-schema-go/ 1. go get aqwari.net/xml/cmd/xsdgen 2. xsdgen -o s3api_xsd_generated.go -pkg s3api AmazonS3.xsd