Integration test should run full screen

[Daniel Korn]

Integration tests using Selenium Webdriver are currently running in a medium size window (Selenium's defualt size for Firefox browser).
Maximizing the Firefox's window size requires a simple change and will improve the tests display on run time.

TODO:
---------
Add maximize_window() method to the driver in openstack_dashboard/test/integration_tests/helpers.py --> BaseTestCase --> setUp.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/105199
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=42b24326e17360898178c0ccd17434ed00b5b0f4
Submitter: Jenkins
Branch: master

commit 42b24326e17360898178c0ccd17434ed00b5b0f4
Author: Daniel Korn <email address hidden>
Date: Mon Jul 7 17:21:41 2014 +0300

    Run integration tests full screen

    I added self.driver.maximize_window() to helpers's setUp,
    making all integration tests run full screen (maximizing
    the browser's window).

    Closes-Bug: #1338630
    Change-Id: Idd185ef3a29eb4731d35fa957bf1e7d636237dc8