#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.
return
        executor = lambda_api.LAMBDA_EXECUTOR
        func_name = 'test_destroy_idle_containers'
        func_arn = lambda_api.func_arn(func_name)
        
        executor.destroy_existing_docker_containers()
        self.assertEqual(len(executor.get_all_container_names()), 0)
        
        testutil.create_lambda_function(
            func_name=func_name, handler_file=TEST_LAMBDA_ENV, libs=TEST_LAMBDA_LIBS,
            runtime=LAMBDA_RUNTIME_PYTHON27, envvars={'Hello': 'World'})
        self.assertEqual(len(executor.get_all_container_names()), 0)
        self.lambda_client.invoke(FunctionName=func_name, Payload=b'{}')
        self.assertEqual(len(executor.get_all_container_names()), 1)
        
        executor.idle_container_destroyer()
        self.assertEqual(len(executor.get_all_container_names()), 1)
        
        executor.function_invoke_times[func_arn] = time.time() - lambda_executors.MAX_CONTAINER_IDLE_TIME_MS
        executor.idle_container_destroyer()
        self.assertEqual(len(executor.get_all_container_names()), 0)
        
        testutil.delete_lambda_function(func_name)
class Util(object):
    @classmethod
    def create_function(cls, file, name, runtime=None, libs=None):
        runtime = runtime or LAMBDA_RUNTIME_PYTHON27
        testutil.create_lambda_function(
            func_name=name, handler_file=file, libs=TEST_LAMBDA_LIBS, runtime=runtime)