install pinned google-chrome-beta

playbooks/roles/browsers/defaults/main.yml

@@ -13,7 +13,7 @@ browser_deb_pkgs:
 # which often causes spurious acceptance test failures.
 browser_s3_deb_pkgs:
     - { name: "firefox-mozilla-build_42.0-0ubuntu1_amd64.deb", url: "https://s3.amazonaws.com/vagrant.testeng.edx.org/firefox-mozilla-build_42.0-0ubuntu1_amd64.deb" }
-    - { name: "google-chrome-stable_55.0.2883.87-1_amd64.deb", url: "https://s3.amazonaws.com/vagrant.testeng.edx.org/google-chrome-stable_55.0.2883.87-1_amd64.deb" }
+    - { name: "google-chrome-beta_56.0.2924.67-1_amd64.deb", url: "https://s3.amazonaws.com/vagrant.testeng.edx.org/google-chrome-beta_56.0.2924.67-1_amd64.deb" }
 
 # ChromeDriver
 chromedriver_version: 2.27

playbooks/roles/test_build_server/tasks/main.yml

@@ -42,8 +42,8 @@
     chdir: "{{ test_build_server_repo_path }}/"
   become_user: "{{ test_build_server_user }}"
   with_items:
+    - "lettuce"
     - "unit"
     - "js"
     - "bokchoy"
-    - "lettuce"
     - "quality"