#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.
self.assertEqual(to_str(result_data).strip(), '{}')
        
        testutil.delete_lambda_function(TEST_LAMBDA_NAME_RUBY)
class TestJavaRuntimes(LambdaTestBase):
    @classmethod
    def setUpClass(cls):
        cls.lambda_client = aws_stack.connect_to_service('lambda')
        
        if not os.path.exists(TEST_LAMBDA_JAVA):
            mkdir(os.path.dirname(TEST_LAMBDA_JAVA))
            download(TEST_LAMBDA_JAR_URL, TEST_LAMBDA_JAVA)
        
        cls.test_java_jar = load_file(TEST_LAMBDA_JAVA, mode='rb')
        zip_dir = new_tmp_dir()
        zip_lib_dir = os.path.join(zip_dir, 'lib')
        zip_jar_path = os.path.join(zip_lib_dir, 'test.lambda.jar')
        mkdir(zip_lib_dir)
        cp_r(INSTALL_PATH_LOCALSTACK_FAT_JAR, os.path.join(zip_lib_dir, 'executor.lambda.jar'))
        save_file(zip_jar_path, cls.test_java_jar)
        cls.test_java_zip = testutil.create_zip_file(zip_dir, get_content=True)
        testutil.create_lambda_function(
            func_name=TEST_LAMBDA_NAME_JAVA,
            zip_file=cls.test_java_zip,
            runtime=LAMBDA_RUNTIME_JAVA8,
            handler='cloud.localstack.sample.LambdaHandler'
        )
        
        
        testutil.create_lambda_function(
            func_name=TEST_LAMBDA_NAME_JAVA_STREAM,