As an enhancement to https://github.com/localstack/localstack/pull/1194

It would be really helpful to send the Lambda name, either as data, a header, or as part of the URL.

At code location: https://github.com/localstack/localstack/blob/03c6f4bf250edd18eb818ed65090f508636b0bff/localstack/services/awslambda/lambda_api.py#L696

I can likely open a PR to handle this given some feedback on the feature and potential design.

Right now all I see is the following (using `npx http-echo-server`):
```
[socket#8] event: data
--> POST / HTTP/1.1
--> Host: 192.168.1.x:3000
--> User-Agent: python-requests/2.22.0
--> Accept-Encoding: gzip, deflate
--> Accept: */*
--> Connection: keep-alive
--> Content-Length: 9
--> Content-Type: application/x-www-form-urlencoded
-->
-->
[socket#8] event: data
--> Name=test
```
'body': payload,
            'isBase64Encoded': False,
            'resource': resource_path,
            'httpMethod': method,
            'queryStringParameters': query_string_params,
            'requestContext': request_context,
            'stageVariables': {}  
        }
        return run_lambda(event=event, context={}, func_arn=func_arn)
    except Exception as e:
        LOG.warning('Unable to run Lambda function on API Gateway message: %s %s' % (e, traceback.format_exc()))
def process_sns_notification(func_arn, topic_arn, subscriptionArn, message, message_attributes, subject='',):
    event = {
        'Records': [{
            'EventSource': 'localstack:sns',
            'EventVersion': '1.0',
            'EventSubscriptionArn': subscriptionArn,
            'Sns': {
                'Type': 'Notification',
                'TopicArn': topic_arn,
                'Subject': subject,
                'Message': message,
                'Timestamp': timestamp_millis(),
                'MessageAttributes': message_attributes
            }
        }]
    }
    return run_lambda(event=event, context={}, func_arn=func_arn, asynchronous=True)
def process_kinesis_records(records, stream_name):
    def chunks(lst, n):