xvfbwrapper should be with the conditional selenium imports

[Julie Pichon]

Since xvfbwrapper is only a requirement when using selenium, it should be moved together with the conditional imports.

https://github.com/openstack/horizon/blob/44055c1676/horizon/test/helpers.py#L35

This was flagged by a packager.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/103875

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/103875
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=29da865d45dee5d09925afa77c988122c652778e
Submitter: Jenkins
Branch: master

commit 29da865d45dee5d09925afa77c988122c652778e
Author: Julie Pichon <email address hidden>
Date: Fri Jun 27 21:41:05 2014 +0100

    Make xvfbwrapper import dependent on the selenium imports

    It will not be required unless Selenium is also present.

    Change-Id: I9da1c596ad68b68c3ce4e8cd215646209dbaebe7
    Closes-Bug: #1336243