Abstract repeated code in SmallGroup and ClassYear controllers

[aeksco]

In both smallgroup.controller.js and classyear.controller.js the following four functions are identical:

• handleError
• validationError
• generateCode
• uniqueDayCode

We should abstract these four functions into a separate file and import them as needed.

Let's abstract them into a file called observatory-server/server/api/lib/helpers.js - use the following code as an example of how to import the functions into both controller files:

import { handleError, validationError, generateCode, uniqueDayCode } from '../lib/helpers'

[aeksco]

Resolved