MacOS 10.14.6 Mojave.
Node v10.15.3
LocalStack - docker image 0.10.4

When invoking a Lambda from Node.js code.


    const lambda = new Aws.Lambda(creds);
    
    const payload = {};
    
    const clientContext = {
        invokedFunctionArn: this._workerArn
    };
    
    const params = {
        FunctionName: this._workerArn,
        InvocationType: "RequestResponse", // "DryRun",
        LogType: 'Tail', // "None", "Tail"
        ClientContext: JSON.stringify(clientContext),
        Payload: JSON.stringify(payload)
    };
    
    console.log(`DEBUG: Executing lambda ${JSON.stringify(params)}`);
    
    lambda.invoke(params, function (err, data) {
        console.log(`DEBUG: Printing lambda return arguments`);
        console.log(JSON.stringify(arguments));
        console.log(data.LogResult);
    });```
DEBUG: Printing lambda return arguments
{"0":null,"1":{"StatusCode":200,"Payload":"null"}}
undefined
```

Expecting to see the Lambda execution log in `data.LogResult`, but no such object returned,
yet Localstack Cloudwatch logs recorded the execution logs correctly.


```
EVENTS	75	1570381308926.664	+51733/05/27/[$LATEST]629146bb	START RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3 Version: $LATEST	1570381306039
EVENTS	76	1570381308926.664	+51733/05/27/[$LATEST]629146bb	2019-10-06T17:01:47.924Z	dbd86068-78c8-1a62-29ca-9c0a4a8580c3	INFO	DEBUG: LOCALSTACK_HOSTNAME=172.17.0.1	1570381306520
...
EVENTS	79	1570381308926.664	+51733/05/27/[$LATEST]629146bb	END RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3	1570381307961
EVENTS	80	1570381308926.664	+51733/05/27/[$LATEST]629146bb	REPORT RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3	Duration: 16.05 ms	Billed Duration: 100 ms	Memory Size: 1536 MB	Max Memory Used: 57 MB		1570381308442
```

What I'm missing? Why it doesn't return logs on invoke?

Thanks



┆Issue is synchronized with this [Jira Bug](https://localstack.atlassian.net/browse/LOC-125) by [Unito](https://www.unito.io/learn-more)

if m and m.group(2):
        qualifier = m.group(2)[1:]
        arn = m.group(1)
    else:
        qualifier = request.args.get('Qualifier')
    data = request.get_data()
    if data:
        data = to_str(data)
        try:
            data = json.loads(data)
        except Exception:
            try:
                
                data = json.loads(parse_chunked_data(data))
            except Exception:
                return error_response('The payload is not JSON: %s' % data, 415,
                                      error_type='UnsupportedMediaTypeException')
    
    invocation_type = request.headers.get('X-Amz-Invocation-Type', 'RequestResponse')
    log_type = request.headers.get('X-Amz-Log-Type')
    def _create_response(invocation_result, status_code=200, headers={}):
        """ Create the final response for the given invocation result. """
        if not isinstance(invocation_result, lambda_executors.InvocationResult):
            invocation_result = lambda_executors.InvocationResult(invocation_result)
        result = invocation_result.result
        log_output = invocation_result.log_output
        details = {
            'StatusCode': status_code,
            'Payload': result,
            'Headers': headers