Upgrade tests tools and lint migrations and scripts (part 2) (#9998)

* upgrade gulp-babel

* upgrade babel-eslint

* upgrade eslint-friendly-formatter

* start upgrading chai

* start to upgrade eslint

* restore skipped tests

* start to upgrqde monk

* fix linting and remove unused file

* fix mocha notifications, and common tests

* fix unit tests

* start to fix initrgration tests

* more integration tests fixes

* upgrade monk to latest version

* lint /scripts

* migrations: start moving to /archive unused migrations and run eslint with --fix

* lint migrations

* fix more integration tests

* fix test

migrations/archive/2014/20140803_remove_undefined_notifications.js

@@ -0,0 +1,13 @@
+let _ = require('lodash');
+
+db.users.find({}).forEach(function (user) {
+  let newNewMessages = {};
+
+  _.each(user.newMessages, function (val, key) {
+    if (key != 'undefined') {
+      newNewMessages[key] = val;
+    }
+  });
+
+  db.users.update({_id: user._id}, {$set: {newMessages: newNewMessages}});
+});