Remove sudo:false from travis.yml
Remove sudo:false from travis.yml

Fixes #10023

Travis is migrating away from their container based infrastructure which
is something we should be ahead of and see what the impact is.

kumar303/olympia,psiinon/addons-server,wagnerand/addons-server,mozilla/addons-server,diox/olympia,wagnerand/olympia,kumar303/addons-server,kumar303/olympia,diox/olympia,kumar303/addons-server,bqbn/addons-server,psiinon/addons-server,aviarypl/mozilla-l10n-addons-server,psiinon/addons-server,mozilla/olympia,eviljeff/olympia,mozilla/addons-server,wagnerand/addons-server,psiinon/addons-server,wagnerand/addons-server,bqbn/addons-server,mozilla/olympia,wagnerand/olympia,kumar303/addons-server,bqbn/addons-server,aviarypl/mozilla-l10n-addons-server,wagnerand/olympia,kumar303/addons-server,eviljeff/olympia,mozilla/olympia,wagnerand/addons-server,eviljeff/olympia,mozilla/addons-server,bqbn/addons-server,aviarypl/mozilla-l10n-addons-server,diox/olympia,wagnerand/olympia,eviljeff/olympia,kumar303/olympia,mozilla/olympia,mozilla/addons-server,kumar303/olympia,aviarypl/mozilla-l10n-addons-server,diox/olympia