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`.
def test_dotnet_lambda_running_in_docker(self):
        if not use_docker():
            return
        testutil.create_lambda_function(
            func_name=TEST_LAMBDA_NAME_DOTNETCORE2,
            zip_file=self.zip_file_content,
            handler='DotNetCore2::DotNetCore2.Lambda.Function::SimpleFunctionHandler',
            runtime=LAMBDA_RUNTIME_DOTNETCORE2
        )
        result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_DOTNETCORE2, Payload=b'{}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)
        self.assertEqual(to_str(result_data).strip(), '{}')
        
        expected = ['Running .NET Core 2.0 Lambda']
        self.check_lambda_logs(TEST_LAMBDA_NAME_DOTNETCORE2, expected_lines=expected)
        
        testutil.delete_lambda_function(TEST_LAMBDA_NAME_DOTNETCORE2)
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
        zip_file = testutil.create_zip_file(
            TEST_LAMBDA_RUBY, get_content=True)
        testutil.create_lambda_function(
            func_name=TEST_LAMBDA_NAME_RUBY,