#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.
testutil.delete_lambda_function(function_name)
        sqs_client.delete_queue(QueueUrl=queue_url)
    def test_lambda_put_item_to_dynamodb(self):
        table_name = 'ddb-table-{}'.format(short_uid())
        function_name = '{}-{}'.format(TEST_LAMBDA_FUNCTION_PREFIX, short_uid())
        aws_stack.create_dynamodb_table(table_name, partition_key='id')
        testutil.create_lambda_function(handler_file=TEST_LAMBDA_PUT_ITEM_FILE,
                                        func_name=function_name,
                                        runtime=LAMBDA_RUNTIME_PYTHON36)
        data = {
            short_uid(): 'data-{}'.format(i)
            for i in range(3)
        }
        event = {
            'table_name': table_name,
            'region_name': config.DEFAULT_REGION,
            'items': [{'id': k, 'data': v} for k, v in data.items()]
        }
        self.lambda_client.invoke(
            FunctionName=function_name,
            Payload=json.dumps(event)
        )
        dynamodb = aws_stack.connect_to_resource('dynamodb')
        rs = dynamodb.Table(table_name).scan()
        items = rs['Items']
        self.assertEqual(len(items), len(data.keys()))
        for item in items:
            self.assertEqual(data[item['id']], item['data'])
        
        testutil.delete_lambda_function(function_name)