Xenial browser requirements

* Remove OS version conditionals
* Pin Firefox to v45.*

playbooks/roles/browsers/defaults/main.yml

 browser_deb_pkgs:
     - dbus-x11
-    - firefox
     - gdebi
     - libcurl3
     - libgconf2-4
@@ -9,15 +8,18 @@ browser_deb_pkgs:
     - xdg-utils
     - xvfb
 
-# Debian packages we host in S3 to ensure correct browser version
-# Both Chrome and FireFox update their apt repos with the latest version,
-# which often causes spurious acceptance test failures.
-browser_s3_deb_pkgs:
-    - { 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" }
-
-# Firefox
+# Firefox for Xenial
 firefox_version: version 45.*
 
+# Packages we host in S3 to ensure correct browser version Both Chrome and
+# FireFox update their apt repos with the latest version, which often causes
+# spurious acceptance test failures.
+browser_s3_deb_pkgs:
+  - name: firefox_45.0.2+build1-0ubuntu1_amd64
+    url: https://s3.amazonaws.com/vagrant.testeng.edx.org/firefox_45.0.2%2Bbuild1-0ubuntu1_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
+
 # ChromeDriver
 chromedriver_version: 2.27
 chromedriver_url: "http://chromedriver.storage.googleapis.com/{{ chromedriver_version }}/chromedriver_linux64.zip"

playbooks/roles/browsers/tasks/main.yml

@@ -14,21 +14,24 @@
 
 - name: install system packages
   apt:
-    pkg: "{{ ','.join(browser_deb_pkgs) }}"
+    name: "{{ item }}"
     update_cache: yes
+  with_items: "{{ browser_deb_pkgs }}"
   tags:
     - install
     - install:system-requirements
 
-- name: download browser debian packages from S3
-  get_url: dest="/tmp/{{ item.name }}" url="{{ item.url }}"
+- name: download browser packages from S3
+  get_url:
+    dest: /tmp/{{ item.name }}
+    url: "{{ item.url }}"
   register: download_deb
   with_items: "{{ browser_s3_deb_pkgs }}"
   tags:
     - install
     - install:system-requirements
 
-- name: install browser debian packages
+- name: install browser packages
   shell: gdebi -nq /tmp/{{ item.name }}
   when: download_deb.changed
   with_items: "{{ browser_s3_deb_pkgs }}"
@@ -36,16 +39,6 @@
     - install
     - install:system-requirements
 
-# Because the source location has been deprecated, we need to
-# ensure it does not interfere with subsequent apt commands
-- name: remove google chrome debian source list
-  file:
-    path: /etc/apt/sources.list.d/google-chrome.list
-    state: absent
-  tags:
-    - install
-    - install:system-requirements
-
 - name: download ChromeDriver
   get_url:
     url: "{{ chromedriver_url }}"
@@ -134,42 +127,21 @@
     - install
     - install:system-requirements
 
-- name: create xvfb upstart script for Precise and Trusty (12.04 and 14.04)
-  template:
-    src: xvfb.conf.j2
-    dest: /etc/init/xvfb.conf
-    owner: root
-    group: root
-  when: ansible_distribution_release in ['precise', 'trusty']
-  tags:
-    - install
-    - install:configuration
-
-- name: start xvfb upstart script for Precise and Trusty (12.04 and 14.04)
-  shell: start xvfb
-  ignore_errors: yes
-  when: ansible_distribution_release in ['precise', 'trusty']
-  tags:
-    - install
-    - install:configuration
-
-- name: create xvfb systemd service for Xenial (16.04)
+- name: create xvfb systemd service
   template:
     src: xvfb.service.j2
     dest: /etc/systemd/system/xvfb.service
     owner: root
     group: root
-  when: ansible_distribution_release == 'xenial'
   tags:
     - install
     - install:configuration
 
-- name: enable and start xvfb systemd service for Xenial (16.04)
+- name: enable and start xvfb systemd service
   systemd:
     name: xvfb
     enabled: yes
     state: started
-  when: ansible_distribution_release == 'xenial'
   tags:
     - install
     - install:configuration

playbooks/roles/browsers/templates/xvfb.conf.j2

-description     "Xvfb X Server"
-start on (net-device-up and local-filesystems and runlevel [2345])
-stop on runlevel [016]
-exec /usr/bin/Xvfb {{ browser_xvfb_display }} -screen 0 1024x768x24
-respawn
-respawn limit 15 5

playbooks/roles/browsers/templates/xvfb.service.j2

@@ -2,7 +2,7 @@
 Description=Xvfb X Server
 After=network.target
 
-[Service] 
+[Service]
 ExecStart=/usr/bin/Xvfb {{ browser_xvfb_display }} -screen 0 1024x768x24
 
 [Install]