StandardError raised if no response content type found for deserialization

[nickkaranatsios]

Some requests for example https://graph.microsoft.com/v1.0/identityProtection/riskyUsers/confirmCompromised may return a status 204 reason No Content and an empty response body.

@status=204 @reason_phrase="No Content" @response_body=""

This should not be treated as a fatal error and the send_async(request_info, factory, errors_mapping) method should just return an empty body