Use error message from Sony Ci api http response body for SonyCiApi::HttpError

[afred]

Because

For SonyCiApi::HttpError, which wraps Faraday::Error, it is currently fetching the error message from the Faraday::Error object, which is generic, e.g. "there was a problem and the server returned status 400", or something like that.

Meanwhile, the real error is embedded in Faraday::Error#response['body'] which is a JSON string. Once parsed, a better error message can be found.

NOTE: Sony Ci puts the error message under a couple different properties. One of them is either error or error_messge, or maybe it's error.message? I don't recall off hand, but I think this is the most common one. But another one place they put it is in error_description, so it will take some trial and error to figure out where the error messages are stashed. If we miss one, then we should fallback to the Faraday::Error#message value.

Done when

1. SonyCiApi::HttpErro#message returns the error message contained within the Sony Ci api http response, which is in the Faraday::Error#response, if present.
2. if not present, then falls back to the value of Faraday::Error#message