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
```
BUCKET_LIFECYCLE = {}
BUCKET_REPLICATIONS = {}
BUCKET_ENCRYPTIONS = {}
OBJECT_LOCK_CONFIGS = {}
LOGGER = logging.getLogger(__name__)
XMLNS_S3 = 'http://s3.amazonaws.com/doc/2006-03-01/'
BUCKET_NAME_REGEX = (r'(?=^.{3,63}$)(?!^(\d+\.)+\d+$)' +
    r'(^(([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])\.)*([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])$)')
NOTIFICATION_DESTINATION_TYPES = ('Queue', 'Topic', 'CloudFunction', 'LambdaFunction')
OBJECT_METADATA_KEY_PREFIX = 'x-amz-meta-'
ALLOWED_HEADER_OVERRIDES = {
    'response-content-type': 'Content-Type',
    'response-content-language': 'Content-Language',
    'response-expires': 'Expires',
    'response-cache-control': 'Cache-Control',
    'response-content-disposition': 'Content-Disposition',
    'response-content-encoding': 'Content-Encoding',
}
def event_type_matches(events, action, api_method):
    """ check whether any of the event types in `events` matches the
        given `action` and `api_method`, and return the first match. """
    events = events or []
    for event in events:
        regex = event.replace('*', '[^:]*')
        action_string = 's3:%s:%s' % (action, api_method)
        match = re.match(regex, action_string)
        if match:
            return match
    return False
def filter_rules_match(filters, object_path):