Added migration runner that allows for migrations to use server code (#8436)

* Added migration runner that allows for migrations to use server code

* Replaced example script in migration runner

migrations/migration-runner.js

@@ -0,0 +1,21 @@
+require("babel-register");
+require("babel-polyfill");
+
+// This file must use ES5, everything required can be in ES6
+
+function setUpServer () {
+  var nconf = require('nconf');
+  var mongoose = require('mongoose');
+  var Bluebird = require('bluebird');
+  var setupNconf = require('../website/server/libs/setupNconf');
+  setupNconf();
+  // We require src/server and npt src/index because
+  // 1. nconf is already setup
+  // 2. we don't need clustering
+  require('../website/server/server'); // eslint-disable-line global-require
+}
+setUpServer();
+
+// Replace this with your migration
+var processUsers = require('./new_stuff');
+processUsers();

migrations/new_stuff.js

@@ -80,4 +80,4 @@ function exiting(code, msg) {
   process.exit(code);
 }
 
-processUsers()
+module.exports = processUsers;