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_sync_groups_with_firebase.js

@@ -0,0 +1,43 @@
+/*
+ * Sync groups with Firebase
+ */
+
+let mongo = require('mongoskin');
+let Firebase = require('Firebase');
+
+let dbserver = 'mongodb://url';
+let dbname = 'db';
+
+let db = mongo.db(`${dbserver  }/${  dbname  }?auto_reconnect`);
+let dbGroups = db.collection('groups');
+let countGroups = 0;
+
+let firebaseRef = new Firebase('https://' + 'firebase-app' + '.firebaseio.com');
+
+// TODO handle sync errors with firebase?
+firebaseRef.authWithCustomToken('firebase-secret', function (err, authData) {
+  if (err) throw new Error('Impossible to authenticate Firebase');
+
+  console.log('Firebase connected, begins work on db');
+
+  dbGroups.findEach({}, {_id: 1, members: 1}, {batchSize: 100}, function (err, group) {
+    if (err) throw err;
+    if (group._id !== 'habitrpg') return;
+
+    countGroups++;
+    console.log('Group: ', countGroups);
+
+    firebaseRef.child(`rooms/${  group._id}`)
+      .set({
+        name: group.name,
+      });
+
+    group.members.forEach(function (member) {
+      firebaseRef.child(`members/${  group._id  }/${  userId}`)
+        .set(true);
+
+      firebaseRef.child(`users/${  member  }/rooms/${  group._id}`)
+        .set(true);
+    });
+  });
+});