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_fix_leaders.js

@@ -0,0 +1,79 @@
+/*
+ * Make sure leaders are existing users
+ */
+
+let mongo = require('mongoskin');
+let async = require('async');
+
+let dbserver = 'url';
+let dbname = 'dbname';
+let countGroups = 0;
+let countUsers = 0;
+
+let db = mongo.db(`${dbserver  }/${  dbname  }?auto_reconnect`);
+let dbUsers = db.collection('users');
+let dbGroups = db.collection('groups');
+
+console.log('Begins work on db');
+
+function findGroups (gt) {
+  let query = {};
+  if (gt) query._id = {$gt: gt};
+
+  console.log(query);
+
+  dbGroups.find(query, {
+    fields: {_id: 1, members: 1, leader: 1},
+    limit: 10000,
+    sort: {
+      _id: 1,
+    },
+  }).toArray(function (err, groups) {
+    if (err) throw err;
+
+    let lastGroup = null;
+    if (groups.length === 10000) {
+      lastGroup = groups[groups.length - 1];
+    }
+
+    async.eachLimit(groups, 30, function (group, cb1) {
+      countGroups++;
+      console.log('Group: ', countGroups, group._id);
+
+      let members = group.members;
+
+      dbUsers.findOne({_id: group.leader}, {fields: {_id: 1}}, function (err, user) {
+        if (err) return cb1(err);
+
+        // If leader has deleted account
+        if (!user && group._id !== 'habitrpg' && members && members[0]) {
+          dbGroups.update({
+            _id: group._id,
+          }, {
+            $set: {
+              // Set first user as new leader
+              leader: members[0],
+            },
+          }, {
+            multi: false,
+          }, function (err, res) {
+            if (err) return cb1(err);
+
+            console.log('Updated: ', res);
+            return cb1();
+          });
+        } else {
+          return cb1();
+        }
+      });
+    }, function (err) {
+      if (err) throw err;
+
+      if (lastGroup && lastGroup._id) {
+        findGroups(lastGroup._id);
+      }
+    });
+  });
+}
+
+findGroups();