Use babel to generate translation file

[Alex Xu]

Following http://wiki.openstack.org/Translations to integrate transifex
    translation into quantum

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/20332

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/20332
Committed: http://github.com/openstack/quantum/commit/c740986599c0185067697656d9aedcd73c496e81
Submitter: Jenkins
Branch: master

commit c740986599c0185067697656d9aedcd73c496e81
Author: He Jie Xu <email address hidden>
Date: Thu Jan 24 00:07:18 2013 +0800

    Use babel to generate translation file

    Fixes bug 1103519

    Following http://wiki.openstack.org/Translations to integrate transifex
    translation into quantum

    We added the empty file quantum/locale/quantum.pot to avoid the
    failure of the Jenkin's translation-jobs because git doesn't allow empty
    directory to be added into the repository.

    After this patch accepted, we need to do as below:
    1. Make the transifex quantum project
    (https://www.transifex.com/projects/p/quantum/) as part of the
    openstack transifex project hub and give access to the transifex
    openstack Jenkins account.

    2. Add the translation-jobs into openstack/openstack-ci-puppet for
    ceilometer.

    Change-Id: I329a8bdc51ed8a0e75399c592d3991b1ec06a855