BadRequestError when upload file with cookies
When I use `apollo-upload-examples` with express and redis with cookie session, I can't upload files.

The message error is:

```
BadRequestError: Missing multipart field ‘operations’ (https://github.com/jaydenseric/graphql-multipart-request-spec).
```

I have created a fork of the example project to simulate the problem, you can see it in:

[https://github.com/JMoldes/apollo-upload-examples/tree/error-with-express-redis](https://github.com/JMoldes/apollo-upload-examples/tree/error-with-express-redis)

The changes that I have made are:

* Install the modules `express`, `apollo-server-express`, `connect-redis-sessions`  and `cookie-parser`
* Modify `server.mjs` to use express, and use the middleware connect-redis-sessions, and create a test session when upload the first file
* Modify `_app.js` for add `credentials: 'include' `  to **createUploadlink**

When I execute `npm run dev' for api and app, (previously I have to install redis ...), the first file I upload is ok, because I have not sent any cookies yet,

But after the first file is sent, te api sent a cookie to client, and when I upload the sencod file the Api show the next message:

```
BadRequestError: Missing multipart field ‘operations’ (https://github.com/jaydenseric/graphql-multipart-request-spec).
```

If I comment the line 22: `app.use(fnCRS)`  the file upload ok.

![image](https://user-images.githubusercontent.com/4438532/61524099-ff8d5b80-aa15-11e9-856a-e00197a05b49.png)


Why can not I upload files with express and redis using session cookies