sqs.changeMessageVisibility according to [this](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/APIReference/API_ChangeMessageVisibility.html#API_ChangeMessageVisibility_Examples) makes a request directly to the Queue's URL rather than via the SQS Endpoint. (I'm already setting SQS endpoint to LOCALSTACK_HOSTNAME - makes no difference for this call)..

In localstack the queue URL host returned is by default set to the value of HOSTNAME_EXTERNAL, which I'm setting to localstack, but calling this method within a lambda, does not work and I get the error:

```
UnknownEndpoint: Inaccessible host: `localstack'. This service may not be available in the `us-east-1' region. 
```

So, how can I make the queue URL accessible from within a lambda using localstack? Effectively I need to make **http://localstack** accessible from within lambda.

I'm using the following cmd to start localstack:

```
LAMBDA_EXECUTOR=docker-reuse DEBUG=1 LAMBDA_REMOTE_DOCKER=0 DATA_DIR=/tmp/localstack/data HOSTNAME_EXTERNAL=localstack localstack start
```
account_id = get_account_id(account_id)
    return ('arn:aws:firehose:%s:%s:deliverystream/%s' % (get_region(), account_id, stream_name))
def s3_bucket_arn(bucket_name, account_id=None):
    return 'arn:aws:s3:::%s' % (bucket_name)
def _resource_arn(name, pattern, account_id=None, region_name=None):
    if ':' in name:
        return name
    account_id = get_account_id(account_id)
    region_name = region_name or get_region()
    return pattern % (region_name, account_id, name)
def create_sqs_queue(queue_name, env=None):
    env = get_environment(env)
    
    conn = connect_to_service('sqs', env=env)
    return conn.create_queue(QueueName=queue_name)
def sqs_queue_arn(queue_name, account_id=None, region_name=None):
    account_id = get_account_id(account_id)
    region_name = region_name or get_region()
    return ('arn:aws:sqs:%s:%s:%s' % (region_name, account_id, queue_name))
def apigateway_restapi_arn(api_id, account_id=None, region_name=None):
    account_id = get_account_id(account_id)
    region_name = region_name or get_region()
    return ('arn:aws:apigateway:%s:%s:/restapis/%s' % (region_name, account_id, api_id))
def sqs_queue_name(queue_arn):
    parts = queue_arn.split(':')
    return queue_arn if len(parts) == 1 else parts[5]
def sns_topic_arn(topic_name, account_id=None):
    account_id = get_account_id(account_id)
    return ('arn:aws:sns:%s:%s:%s' % (get_region(), account_id, topic_name))
def get_sqs_queue_url(queue_arn):