#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.
dynamodb_client = aws_stack.connect_to_service('dynamodb')
        dynamodb_client.delete_table(TableName=table_name)
    def test_lambda_start_stepfunctions_execution(self):
        function_name = '{}-{}'.format(TEST_LAMBDA_FUNCTION_PREFIX, short_uid())
        resource_lambda_name = '{}-{}'.format(TEST_LAMBDA_FUNCTION_PREFIX, short_uid())
        state_machine_name = 'state-machine-{}'.format(short_uid())
        testutil.create_lambda_function(handler_file=TEST_LAMBDA_START_EXECUTION_FILE,
                                        func_name=function_name,
                                        runtime=LAMBDA_RUNTIME_PYTHON36)
        testutil.create_lambda_function(handler_file=TEST_LAMBDA_ECHO_FILE,
                                        func_name=resource_lambda_name,
                                        runtime=LAMBDA_RUNTIME_PYTHON36)
        state_machine_def = {
            'StartAt': 'step1',
            'States': {
                'step1': {
                    'Type': 'Task',
                    'Resource': aws_stack.lambda_function_arn(resource_lambda_name),
                    'ResultPath': '$.result_value',
                    'End': True
                }
            }
        }
        sfn_client = aws_stack.connect_to_service('stepfunctions')
        rs = sfn_client.create_state_machine(
            name=state_machine_name,
            definition=json.dumps(state_machine_def),
            roleArn=aws_stack.role_arn('sfn_role')
        )
        sm_arn = rs['stateMachineArn']