When I "PUT" an object using a pre-signed by localstack S3 URL, the localstack responds with "Content Length: 233" and `<PutObjectResponse>...</PutObjectResponse>` XML in the body. 

When I run the same code against AWS S3, the content length is 0 and response body blank. Would be great if localstack matched the AWS S3 response.

Running the latest 0.9.3 localstack docker image.
response = self.sqs_client.receive_message(QueueUrl=queue_url)
        messages = [json.loads(to_str(m['Body'])) for m in response['Messages']]
        record = messages[0]['Records'][0]
        self.assertIsNotNone(record['s3']['object']['versionId'])
        self.assertEquals(record['s3']['object']['versionId'], obj['VersionId'])
        
        self.s3_client.put_bucket_versioning(Bucket=TEST_BUCKET_WITH_NOTIFICATION,
                                             VersioningConfiguration={'Status': 'Disabled'})
        self.sqs_client.delete_queue(QueueUrl=queue_url)
        self.s3_client.delete_objects(Bucket=TEST_BUCKET_WITH_NOTIFICATION,
                                 Delete={'Objects': [{'Key': key_by_path}, {'Key': key_by_host}]})
        self.s3_client.delete_bucket(Bucket=TEST_BUCKET_WITH_NOTIFICATION)
    def generate_large_file(self, size):
        
        filename = 'large_file_%s' % uuid.uuid4()
        f = open(filename, 'wb')
        f.seek(size - 1)
        f.write(b'\0')
        f.close()
        return open(filename, 'r')
    def test_s3_upload_fileobj_with_large_file_notification(self):
        
        queue_url = self.sqs_client.create_queue(QueueName=TEST_QUEUE_FOR_BUCKET_WITH_NOTIFICATION)['QueueUrl']
        queue_attributes = self.sqs_client.get_queue_attributes(QueueUrl=queue_url, AttributeNames=['QueueArn'])
        
        self.s3_client.create_bucket(Bucket=TEST_BUCKET_WITH_NOTIFICATION)
        self.s3_client.put_bucket_notification_configuration(Bucket=TEST_BUCKET_WITH_NOTIFICATION,
            NotificationConfiguration={'QueueConfigurations': [
                {'QueueArn': queue_attributes['Attributes']['QueueArn'],
                 'Events': ['s3:ObjectCreated:*']}]})