With today's update this `serverless.yml` no longer deploys:

```yaml
service: "localtest"

provider:
  name: "aws"
  runtime: "nodejs10.x"

functions:
  hello:
    handler: "handler.hello"
    events:
    - http:
        path: "/"
        method: "get"
        integration: "lambda-proxy"

plugins:
  - "serverless-localstack"

custom:
  localstack:
    stages:
      - "local"
```

The error on the localstack end seems to be that it cannot create `ApiGateway::RestApi` type resources:
```
2019-10-24T09:10:41:DEBUG:localstack.utils.cloudformation.template_deployer: Deploying resource type "ApiGateway::RestApi" id "ApiGatewayRestApi"
2019-10-24T09:10:41:DEBUG:localstack.utils.cloudformation.template_deployer: Request for creating resource type "ApiGateway::RestApi": create_rest_api {'name': 'local-localtest'}
2019-10-24T09:10:41:ERROR:localstack.services.cloudformation.cloudformation_starter: Unable to parse and create resource "ApiGatewayRestApi": argument of type 'NoneType' is not iterable
```

This is followed by repeated `TypeError` and then `KeyError`.
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)
    def test_docker_command_for_separate_container_lambda_executor(self):
        
        if not isinstance(lambda_api.LAMBDA_EXECUTOR,
                          lambda_executors.LambdaExecutorSeparateContainers):
            return
        executor = lambda_api.LAMBDA_EXECUTOR
        func_name = 'test_docker_command_for_separate_container_lambda_executor'
        func_arn = lambda_api.func_arn(func_name)
        handler = 'handler'
        lambda_cwd = '/app/lambda'
        network = 'compose_network'
        config.LAMBDA_DOCKER_NETWORK = network
        cmd = executor.prepare_execution(func_arn, {}, LAMBDA_RUNTIME_NODEJS810, '', handler, lambda_cwd)
        expected = 'docker run -v "%s":/var/task   --network="%s"  --rm "lambci/lambda:%s" "%s"' % (
            lambda_cwd, network, LAMBDA_RUNTIME_NODEJS810, handler)
        self.assertIn(('--network="%s"' % network), cmd, 'cmd=%s expected=%s' % (cmd, expected))
        config.LAMBDA_DOCKER_NETWORK = ''
    def test_destroy_idle_containers(self):
        
        if not isinstance(lambda_api.LAMBDA_EXECUTOR,
                          lambda_executors.LambdaExecutorReuseContainers):
            return
        executor = lambda_api.LAMBDA_EXECUTOR
        func_name = 'test_destroy_idle_containers'