docs translation import errors

[David Lyle]

When building docs, there are a ton of errors in this format:

AppRegistryNotReady: The translation infrastructure cannot be initialized before the apps registry is ready. Check that you don't make non-lazy gettext calls at import time.

Starting in Django 1.7, standalone scripts, such as a sphinx build require that django.setup() be called first. See:
https://docs.djangoproject.com/en/1.8/releases/1.7/#standalone-scripts

This should be added to the horizon/docs/source/conf.py

Doing so eliminates the errors.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/214277

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/214277
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=49ae7f9eeb2b84c89a185f4c3595bd7e706c5b84
Submitter: Jenkins
Branch: master

commit 49ae7f9eeb2b84c89a185f4c3595bd7e706c5b84
Author: David Lyle <email address hidden>
Date: Tue Aug 18 10:54:05 2015 -0600

    Fix docs translation import errors

    When building docs, there are a ton of errors in this format:

    AppRegistryNotReady: The translation infrastructure cannot be
    initialized before the apps registry is ready. Check that you don't make
    non-lazy gettext calls at import time.

    Starting in Django 1.7, standalone scripts, such as a sphinx build
    require that django.setup() be called first. See:
    https://docs.djangoproject.com/en/1.8/releases/1.7/#standalone-scripts

    This should be added to the horizon/docs/source/conf.py

    Doing so eliminates the errors.

    Closes-Bug: #1486139
    Change-Id: I0871be3d60d4d78cb430fabdb5725832559191d7