Fix Travis maybe
Fix Travis maybe

This same thing worked to fix the current Travis problem ("Error: Selenium server did not start.Another Selenium process may already be running or your java version may be out of date.") in https://github.com/Brightspace/d2l-my-courses-ui/pull/198, so hopefully it'll work here too!

Brightspace/d2l-siren-parser-ui,Brightspace/d2l-siren-parser-ui