Due to a regression, query string parameters added to the URL (like: http://play.workadventure.localhost/_/global/maps.workadventure.localhost/starter/map.json?utm_source=sendinblue&utm_campaign=WA+-+2021+Christmap+map+launch&utm_medium=email#foo ) were causing a crash in WA. This commit fixes the issue (and adds a E2E test)