With today's update, API Gateway consistently fails to find any of its' defined paths.

For example, the following `serverless.yml` :
```yaml
service: "localtest"

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

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

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

If deployed, will result in the following:
```
~$ sls deploy --stage local
Serverless: Using serverless-localstack
Serverless: Packaging service...
Serverless: Excluding development dependencies...
Serverless: Creating Stack...
Serverless: Checking Stack create progress...
.
Serverless: Stack create finished...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading artifacts...
Serverless: Uploading service localtest.zip file to S3 (3.02 KB)...
Serverless: Validating template...
Serverless: Skipping template validation: Unsupported in Localstack
Serverless: Updating Stack...
Serverless: Checking Stack update progress...
.
Serverless: Stack update finished...
Service Information
service: localtest
stage: local
region: us-east-1
stack: localtest-local
resources: 11
api keys:
  None
endpoints:
  GET - http://localhost:4567/restapis/sz3ijrff91/local/_user_request_/
  GET - http://localhost:4567/restapis/sz3ijrff91/local/_user_request_/test
functions:
  hello: localtest-local-hello
layers:
  None
Serverless: Run the "serverless" command to setup monitoring, troubleshooting and testing.
~$ curl http://localhost:4567/restapis/sz3ijrff91/local/_user_request_/
{"message": "Unable to find integration for path /restapis/sz3ijrff91/local/_user_request_/"}
~$ curl http://localhost:4567/restapis/sz3ijrff91/local/_user_request_/test
{"message": "Unable to find integration for path /restapis/sz3ijrff91/local/_user_request_/test"}
```
sm_name = resolve_refs_recursively(stack_name, sm_name, resources)
            sfn_client = aws_stack.connect_to_service('stepfunctions')
            state_machines = sfn_client.list_state_machines()['stateMachines']
            sm_arn = [m['stateMachineArn'] for m in state_machines if m['name'] == sm_name]
            if not sm_arn:
                return None
            result = sfn_client.describe_state_machine(stateMachineArn=sm_arn[0])
            return result
        elif resource_type == 'StepFunctions::Activity':
            act_name = resource_props.get('Name') or resource_id
            act_name = resolve_refs_recursively(stack_name, act_name, resources)
            sfn_client = aws_stack.connect_to_service('stepfunctions')
            activities = sfn_client.list_activities()['activities']
            result = [a['activityArn'] for a in activities if a['name'] == act_name]
            if not result:
                return None
            return result[0]
        if is_deployable_resource(resource):
            LOG.warning('Unexpected resource type %s when resolving references of resource %s: %s' %
                        (resource_type, resource_id, resource))
    except Exception as e:
        check_not_found_exception(e, resource_type, resource, resource_status)
    return None
def check_not_found_exception(e, resource_type, resource, resource_status):
    
    markers = ['NoSuchBucket', 'ResourceNotFound', '404']
    if not list(filter(lambda marker, e=e: marker in str(e), markers)):
        LOG.warning('Unexpected error retrieving details for resource %s: %s %s - %s %s' %
            (resource_type, e, traceback.format_exc(), resource, resource_status))
def extract_resource_attribute(resource_type, resource, attribute):