fix(ga): Change the cookieDomain parameter to 'auto'. (#2954)

analytics-ga.js

         (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
             (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
         })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-        ga('create', options.googleAnalyticsTrackingId, 'jit.si');
+        ga('create', options.googleAnalyticsTrackingId, 'auto');
         ga('send', 'pageview');
 
         /* eslint-enable */