#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.
rs = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_JS,
            Payload=json.dumps({
                'event_type': 'test_lambda'
            })
        )
        self.assertEqual(rs['ResponseMetadata']['HTTPStatusCode'], 200)
        events = get_lambda_log_events(TEST_LAMBDA_NAME_JS)
        self.assertGreater(len(events), 0)
        
        testutil.delete_lambda_function(TEST_LAMBDA_NAME_JS)
class TestCustomRuntimes(LambdaTestBase):
    @classmethod
    def setUpClass(cls):
        cls.lambda_client = aws_stack.connect_to_service('lambda')
    def test_nodejs_lambda_running_in_docker(self):
        if not use_docker():
            return
        testutil.create_lambda_function(
            func_name=TEST_LAMBDA_NAME_CUSTOM_RUNTIME,
            handler_file=TEST_LAMBDA_CUSTOM_RUNTIME,
            handler='function.handler',
            runtime=LAMBDA_RUNTIME_PROVIDED
        )
        result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_CUSTOM_RUNTIME,
            Payload=b'{"text":"bar with \'quotes\\""}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)
        self.assertEqual(