Templates are not django 1.5 compatible

[Matthias Runge]

https://docs.djangoproject.com/en/1.5/releases/1.5/#overview lists to change url tags in templates:
{% url myview %} to {% url "myview" %}

That should be django-1.4 safe also.

[Matthias Runge (mrunge)]

other changes are: simplejson is now used from system and dropped from Django

[Matthias Runge (mrunge)]

to be changed: openstack_dashboard/dashboards/project/network_topology/views.py:import simplejson

[Gabriel Hurley (gabriel-hurley)]

We'll address Django 1.5 first thing in Havana.

[Lin Hua Cheng (lin-hua-cheng)]

Looks like ALLOWED_HOSTS needs to be added for production settings.

https://docs.djangoproject.com/en/1.5/releases/1.5/#allowed-hosts-required-in-production

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/25574

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/25574
Committed: http://github.com/openstack/horizon/commit/5d32caf3af3b11fcf496ebb04ccfc44f49cbe0b9
Submitter: Jenkins
Branch: master

commit 5d32caf3af3b11fcf496ebb04ccfc44f49cbe0b9
Author: Lin Hua Cheng <email address hidden>
Date: Wed Mar 27 17:16:13 2013 -0700

    Update Horizon for Django 1.5 compatibility

    Changes made:
    - Changed template url tags: {% url myview %} to {% url myview %}
    - Import json instead of django.utils.simplejson
    - Import django.utils.encoding.force_unicode instead of
      django.utils.translation.force_unicode
    - Fixed error in tables/base.py for CheckboxInput, pass a callable
      check_test. Django 1.5 does not silently fail on this now.
    - Set SECRET_KEY in test/settingspy, Django 1.5 refuse to start if it
      is not set.
    - Added notes about ALLOWED_HOSTS when running Horizon in Production

    Fixes bug 1147329

    Change-Id: I6ac1e81498f41141dea99760922991feb310a326