#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.
to_str(result_data).strip(),
            """Echoing request: '{"text": "bar with \'quotes\\""}'""")
        
        expected = ['.*Custom Runtime Lambda handler executing.']
        self.check_lambda_logs(
            TEST_LAMBDA_NAME_CUSTOM_RUNTIME, expected_lines=expected)
        
        testutil.delete_lambda_function(TEST_LAMBDA_NAME_CUSTOM_RUNTIME)
class TestDotNetCoreRuntimes(LambdaTestBase):
    @classmethod
    def setUpClass(cls):
        cls.lambda_client = aws_stack.connect_to_service('lambda')
        cls.zip_file_content2 = load_file(TEST_LAMBDA_DOTNETCORE2, mode='rb')
        cls.zip_file_content31 = load_file(TEST_LAMBDA_DOTNETCORE31, mode='rb')
    def __run_test(self, func_name, zip_file, handler, runtime, expected_lines):
        if not use_docker():
            return
        testutil.create_lambda_function(
            func_name=func_name,
            zip_file=zip_file,
            handler=handler,
            runtime=runtime)
        result = self.lambda_client.invoke(FunctionName=func_name, Payload=b'{}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)
        self.assertEqual(to_str(result_data).strip(), '{}')
        
        
        testutil.delete_lambda_function(func_name)
    def test_dotnetcore2_lambda_running_in_docker(self):