Added chrome to javascript selenium test

Selenium tests on Firefox 35.0 failing due to an open FF bug. Switching
to chrome solves this problem, and tests are passing. The FF bug not
affects usage, just the execution of the test environment.

This patch is related:
https://review.openstack.org/#/c/148928/

Change-Id: Iadd71846be7f64c51fb46bfb5c29f56a81c10e9e

jenkins/jobs/javascript.yaml

@@ -11,6 +11,8 @@
 
     builders:
       - npm-install
+      - xvfb-install
+      - chrome-install
       - revoke-sudo
       - gerrit-git-prep
       - js-build:

jenkins/jobs/macros.yaml

@@ -96,6 +96,13 @@
           sudo apt-get update
           sudo apt-get install -y firefox
 
+- builder:
+    name: chrome-install
+    builders:
+      - shell: |
+          sudo apt-get update
+          sudo apt-get install -y chromium-browser
+
 - builder:
     name: uninstall-puppet
     builders: