Selenium job fails reaching the beta cluster api :(
https://en.wikipedia.beta.wmflabs.org/w/api.php 504 Server Error: Gateway Time-out
Example: https://integration.wikimedia.org/ci/job/selenium-GettingStarted/BROWSER=firefox,MEDIAWIKI_ENVIRONMENT=beta,PLATFORM=Linux,label=contintLabsSlave%20&&%20UbuntuTrusty/210/ which ran on integration-slave-trusty-1004.integration.eqiad.wmflabs