Redirect exceptions in tabs not handled correctly

[Gabriel Hurley]

If an API method raises an exception inside the get_context_data method of a tab it is not caught by Horizon's middleware. This is due to the default deferred rendering done by Django's TemplateResponse class which manages to delay the rendering until after the final middleware has been processed.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/5382

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/5382
Committed: http://github.com/openstack/horizon/commit/b8754d5ecd12b29297d6462b18c2ffc0c3176d90
Submitter: Jenkins
Branch: master

commit b8754d5ecd12b29297d6462b18c2ffc0c3176d90
Author: Gabriel Hurley <email address hidden>
Date: Wed Mar 14 18:55:28 2012 -0700

    Updates Image Details page to match other details pages. Fixes bug 955625.

    While updating these, a bug was discovered in the tab exception handling
    which is also fixed by this patch. Fixes bug 955642.

    Also incorporates some cleanup on the other details pages so that
    they are all uniform and at their best.

    Additionally, added a command to run_tests.sh to update all the translation
    strings (./run_tests.sh -m or --makemessages).

    Updates translation files.

    Change-Id: I61287b91fb442f7343c2ddebfcc547dc559efbdf