#2093  # Type of request: This is a ...

[*] bug report
[ ] feature request

# Detailed description
Unable to invoke lambda function compiled in java 11. Localstack latest image still shows java version 8.

## Expected behavior
Should be able to invoke lambda function compiled in java 11.

## Actual behavior
Getting error-
Exception in thread "main" java.lang.UnsupportedClassVersionError: publisFunction has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

# Steps to reproduce

docker-compose up -d
Create lambda function
Create SQS 
map lambda and sqs
send message to SQS to invoke lambda

Error message SS:
![image](https://user-images.githubusercontent.com/54183749/96603894-1a561c00-12ba-11eb-9d40-a19370a7c3aa.png)

![LS_error](https://user-images.githubusercontent.com/54183749/96603954-293cce80-12ba-11eb-9566-3942f96e564a.png)


Similar issue was reported #2093.  Couldn't find the answer if that was fixed and latest image of Localstack should compile in JAVA 11.
result = sqs_client.receive_message(QueueUrl=queue_url, MessageAttributeNames=['All'])
            self.assertGreater(len(result['Messages']), 0)
            msg_attrs = result['Messages'][0]['MessageAttributes']
            self.assertIn('RequestID', msg_attrs)
            self.assertIn('ErrorCode', msg_attrs)
            self.assertIn('ErrorMessage', msg_attrs)
        retry(receive_dlq, retries=8, sleep=2)
        
        lambda_client.update_function_configuration(FunctionName=lambda_name, DeadLetterConfig={})
        
        result = lambda_client.invoke(FunctionName=lambda_name, Payload=json.dumps(payload))
        payload = json.loads(to_str(result['Payload'].read()))
        self.assertEqual(200, result['StatusCode'])
        self.assertEqual('Unhandled', result['FunctionError'])
        self.assertEqual('$LATEST', result['ExecutedVersion'])
        self.assertIn('Test exception', payload['errorMessage'])
        self.assertEqual('Exception', payload['errorType'])
        self.assertEqual(list, type(payload['stackTrace']))
        
        sqs_client.delete_queue(QueueUrl=queue_url)
        lambda_client.delete_function(FunctionName=lambda_name)
    def test_add_lambda_permission(self):
        function_name = 'lambda_func-{}'.format(short_uid())
        testutil.create_lambda_function(
            handler_file=TEST_LAMBDA_ECHO_FILE,
            func_name=function_name,