…ing exception to retry list
See https://forums.aws.amazon.com/thread.jspa?messageID=356370 for an explanation of the difference. We have seen it occur inside of Dynode's STS.getSessionToken.
…ributes Fixed bug which removed attributes with a value of 0 when calling updateItem
Now `AmazonError.name` is `"AmazonError"` instead of `undefined`, and the name is available on the prototype instead of set on each instance.