If you attempt to send a message to a FIFO queue with a request that contains the `DelaySeconds` parameter, the request fails with an `InvalidParameterValue` response.

This is actually a problem with ElasticMQ, but I'm creating an issue here to track that the version localstack is using gets updated if/when a fix is released.

More Information: https://github.com/softwaremill/elasticmq/issues/273
body_key = 'MD5OfMessageBody' if outgoing else 'MD5OfBody'
            return set([
                (m[body_key], m['MD5OfMessageAttributes'])
                for m in messages
            ])
        messages_to_send = [
            {
                'Id': 'message{:02d}'.format(i),
                'MessageBody': 'msgBody{:02d}'.format(i),
                'MessageAttributes': {
                    'CustomAttribute': {
                        'DataType': 'String',
                        'StringValue': 'CustomAttributeValue{:02d}'.format(i)
                    }
                }
            }
            for i in range(1, 11)
        ]
        resp = self.client.send_message_batch(QueueUrl=queue_url, Entries=messages_to_send)
        sent_hashes = get_hashes(resp.get('Successful', []), outgoing=True)
        self.assertEqual(len(sent_hashes), len(messages_to_send))
        for i in range(2):
            messages = receive_messages(VisibilityTimeout=0)['Messages']
            received_hashes = get_hashes(messages)
            self.assertEqual(received_hashes, sent_hashes)
        self.client.delete_message_batch(
            QueueUrl=queue_url,
            Entries=[