Upgrade Travis image to 'bionic'#562

Merged

tdonohue merged 3 commits intoDSpace:masterfrom

atmire:travis-dist-upgrade

Jan 15, 2020

Commits on Jan 15, 2020

upgrade to bionic
artlowel
committed
add xvfb service for headless chrome
artlowel
committed
remove chrome source, doesn't work anyway and doesn't seem to be needed. Remove chromium to try to solve the issue where travis can't find chrome
artlowel
committed