#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.__run_test(
            func_name=TEST_LAMBDA_NAME_DOTNETCORE2,
            zip_file=self.zip_file_content2,
            handler='DotNetCore2::DotNetCore2.Lambda.Function::SimpleFunctionHandler',
            runtime=LAMBDA_RUNTIME_DOTNETCORE2,
            expected_lines=['Running .NET Core 2.0 Lambda'])
    def test_dotnetcore31_lambda_running_in_docker(self):
        self.__run_test(
            func_name=TEST_LAMBDA_NAME_DOTNETCORE31,
            zip_file=self.zip_file_content31,
            handler='dotnetcore31::dotnetcore31.Function::FunctionHandler',
            runtime=LAMBDA_RUNTIME_DOTNETCORE31,
            expected_lines=['Running .NET Core 3.1 Lambda'])
class TestRubyRuntimes(LambdaTestBase):
    @classmethod
    def setUpClass(cls):
        cls.lambda_client = aws_stack.connect_to_service('lambda')
    def test_ruby_lambda_running_in_docker(self):
        if not use_docker():
            return
        testutil.create_lambda_function(
            func_name=TEST_LAMBDA_NAME_RUBY,
            handler_file=TEST_LAMBDA_RUBY,
            handler='lambda_integration.handler',
            runtime=LAMBDA_RUNTIME_RUBY25
        )
        result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_RUBY, Payload=b'{}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)