In [this PR](https://github.com/localstack/localstack/pull/1200/files) we introduced a new way of starting S3 in a separate process.

In the meantime, the service startup has been significantly reworked, and it seems that we can integrate the S3 starter into the [`multiserver.py`](https://github.com/localstack/localstack/blob/master/localstack/utils/server/multiserver.py) based loading approach that loads multiple APIs in a single process, for performance reasons. We should look into that.
if attribute_name in ['Arn', 'QueueArn']:
            return aws_stack.sqs_queue_arn(queue_name=self.name)
        return SQS_Queue_get_cfn_attribute_orig(self, attribute_name)
    SQS_Queue_get_cfn_attribute_orig = sqs_models.Queue.get_cfn_attribute
    sqs_models.Queue.get_cfn_attribute = SQS_Queue_get_cfn_attribute
    
    def S3_Bucket_get_cfn_attribute(self, attribute_name):
        if attribute_name in ['Arn']:
            return aws_stack.s3_bucket_arn(self.name)
        return S3_Bucket_get_cfn_attribute_orig(self, attribute_name)
    S3_Bucket_get_cfn_attribute_orig = s3_models.FakeBucket.get_cfn_attribute
    s3_models.FakeBucket.get_cfn_attribute = S3_Bucket_get_cfn_attribute
    
    @property
    def SQS_Queue_physical_resource_id(self):
        result = SQS_Queue_physical_resource_id_orig.fget(self)
        if '://' not in result:
            
            return aws_stack.get_sqs_queue_url(result)
        return result
    SQS_Queue_physical_resource_id_orig = sqs_models.Queue.physical_resource_id
    sqs_models.Queue.physical_resource_id = SQS_Queue_physical_resource_id
    
    def LogGroup_get_cfn_attribute(self, attribute_name):