We are having an issue with the latest image of localstack (bc991b0bc3ce).
While creating an SQS and setting parameters we experience the following error:

```
localstack_1        | 2019-09-09T10:46:22:ERROR:localstack.services.generic_proxy: Error forwarding request: 'QueueUrl' Traceback (most recent call last):
localstack_1        |   File "/opt/code/localstack/localstack/services/generic_proxy.py", line 234, in forward
localstack_1        |     path=path, data=data, headers=forward_headers)
localstack_1        |   File "/opt/code/localstack/localstack/services/sqs/sqs_listener.py", line 53, in forward_request
localstack_1        |     self._set_queue_attributes(req_data)
localstack_1        |   File "/opt/code/localstack/localstack/services/sqs/sqs_listener.py", line 245, in _set_queue_attributes
localstack_1        |     queue_url = req_data['QueueUrl'][0]
localstack_1        | KeyError: 'QueueUrl'
```

From the logs I guess the `QueueUrl` is expected and it's not there. We don't see this behaviour in the last version (0.10.2).

<!-- Love localstack? Please consider supporting our collective:
👉  https://opencollective.com/localstack/donate -->
self._send_cors_headers()
                    self.end_headers()
                    return
            
            if response is None:
                forward_headers['Connection'] = forward_headers.get('Connection') or 'close'
                data_to_send = self.data_bytes
                request_url = proxy_url
                if modified_request:
                    if modified_request.url:
                        request_url = '%s%s' % (forward_url, modified_request.url)
                    data_to_send = modified_request.data
                response = self.method(request_url, data=data_to_send,
                    headers=forward_headers, stream=True)
                
                if not response._content_consumed and response.raw:
                    response._content = response.raw.read()
            
            if self.proxy.update_listener:
                kwargs = {
                    'method': method,
                    'path': path,
                    'data': data,
                    'headers': forward_headers,
                    'response': response
                }
                if 'request_handler' in inspect.getargspec(self.proxy.update_listener.return_response)[0]: