Handle data dict type in retry.is_etag_in_json(data) #481
Description
retry.is_etag_in_json(data) is a helper method for conditional retries. It returns a boolean whether or not an etag is contained in the JSON body.
There seem to be use cases in which a dictionary type of data is passed into retry.is_etag_in_json(data). Currently the method is unable to handle dict type data correctly: a JSONDecodeError is caught before examining if an etag is contained within.