function createPart(sigCfg, bucketUtil, s3, key) {
    let uploadId;
    return s3.createBucket({ Bucket: bucket }).promise()
    .then(() => s3.createMultipartUpload({
        Bucket: bucket, Key: key }).promise())
    .then(res => {
        uploadId = res.UploadId;
        return s3.uploadPart({ Bucket: bucket, Key: key,
            PartNumber: 1, UploadId: uploadId, Body: bodyFirstPart }).promise();
    })
    .then(() => Promise.resolve(uploadId));
}
Tests for special characters in XML *