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/2015/20150201_recapture_emails_phase_update.js

@@ -0,0 +1,7 @@
+db.users.update({
+  'flags.recaptureEmailsPhase': {
+    $gt: 0,
+  },
+}, {$inc: {
+  'flags.recaptureEmailsPhase': 1,
+}}, {multi: 1});