Reading/Browser tests/Setting up a browser test instance

Following the instructions Reading/Setting_up_a_browser_test_bot, I've created a bash script, Barry-the-Browser-Test-Bot-Installer in effort to reduce the amount of heavy lifting.

To setup a browser test bot labs-vagrant instance, please follow these instructions:
 * Create a Labs / Gerrit account by signing up at wikitech (eg: Barrythebrowsertestbot)
 * Request a labs project
 * Create a labs instance Choose "ubuntu-14.04-trusty" and configure with role::labs::vagrant checked.
 * ssh into your instance e.g. ssh reading-smoketest.wmflabs.org
 * If you cannot access your labs project. Try ssh -A username@bastion.wmflabs.org then ssh into your instance from there. ssh instance-name
 * Following instructions from Help:Labs-vagrant Run an initial provision and enable the project roles needed for your testing instance.
 * Example:


 * Checkout the Barry installer script and run it as sudo.


 * The script does the following.
 * Installs npm, nodejs-legacy, phantomjs, ruby, ruby-dev, updates gems, bundler, git-review/
 * Creates a system user account for the testbot and does the following for the new user:
 * Installs Barry-the-Browser-Test-Bot at ~/barrybot and adds to $PATH by editing bashrc
 * Creates a new ssh key for the test bot user. This is required to command Gerrit.
 * Asks for the mediawiki server url (eg: http://reading-smoketest.wmflabs.org)
 * Assuming no captcha is enabled, it will create the MediaWiki account Mr_Selenium and writes the bot configuration in ~/.bashrc
 * Asks for a project name and dependency and creates a run script. Currently configures an extension with a dependency. (eg: Gather and MobileFrontend)
 * Writes the run script to /home/$username/barrybot/run.sh
 * Installs and configures Arcanist for phabricator commands
 * Prints your newly created public key and asks you to add it to https://gerrit.wikimedia.org/r/#/settings/ssh-keys
 * Run the bot