Fix test failures because global error handler isn't stubbed
Fix test failures because global error handler isn't stubbed

housinghq/main-raven-js,getsentry/raven-js,getsentry/raven-js,getsentry/raven-js,Mappy/raven-js,getsentry/raven-js,housinghq/main-raven-js,Mappy/raven-js,housinghq/main-raven-js,Mappy/raven-js