#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.
durations = []
        num_iterations = 3
        for i in range(0, num_iterations + 1):
            prev_invoke_time = None
            if i > 0:
                prev_invoke_time = executor.function_invoke_times[func_arn]
            start_time = time.time()
            self.lambda_client.invoke(FunctionName=func_name, Payload=b'{}')
            duration = time.time() - start_time
            self.assertEqual(len(executor.get_all_container_names()), 1)
            
            if i > 0:
                self.assertGreater(executor.function_invoke_times[func_arn], prev_invoke_time)
            else:
                self.assertGreater(executor.function_invoke_times[func_arn], 0)
            durations.append(duration)
        
        for i in range(1, num_iterations + 1):
            self.assertLess(durations[i], durations[0])
        status = executor.get_docker_container_status(func_arn)
        self.assertEqual(status, 1)
        container_network = executor.get_docker_container_network(func_arn)
        self.assertEqual(container_network, 'default')
        executor.cleanup()
        status = executor.get_docker_container_status(func_arn)
        self.assertEqual(status, 0)
        self.assertEqual(len(executor.get_all_container_names()), 0)
        
        testutil.delete_lambda_function(func_name)