Upgrade CI to use Chrome V73
This backports https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/27762 into the 11-10-stable branch in the hopes it resolves a number of flaky tests.
Edited by Stan Hu
This backports https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/27762 into the 11-10-stable branch in the hopes it resolves a number of flaky tests.