Fix a failing test

test_detail_rack had an unstubbed call to Tuskar API and therefore was failing
when the API wasn't running.

Change-Id: Ib70ba0a74a8abc844570766222292b5d59ccbea9
Signed-off-by: Tomas Sedovic <tsedovic@redhat.com>
Remove Django 1.4 tests

Tuskar isn't compatible with Django 1.4 at this point (i.e. the tests fail) and
we've decided not to port it just yet.

Change-Id: I49b9174514a617bbe31073e13750198df75edc76
Signed-off-by: Tomas Sedovic <tsedovic@redhat.com>