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/2015/20150906_groups_remove_empty.js

@@ -0,0 +1,21 @@
+/*
+ * Remove empty private groups
+ */
+
+let mongo = require('mongoskin');
+
+let dbserver = 'url';
+let dbname = 'name';
+
+let db = mongo.db(`${dbserver  }/${  dbname  }?auto_reconnect`);
+let dbGroups = db.collection('groups');
+
+console.log('Begins work on db');
+
+dbGroups.findEach({
+  memberCount: 0,
+}, {_id: 1}, function (err, res) {
+  if (err) throw err;
+
+  console.log(res);
+});