Skip the infinite recursion regression test for Django < 1.5

The test is being skipped because Django 1.4 loads the TEMPLATE_LOADERS
before override_settings can modify it. This means that the SQL query
isn't run when loading the template which causes the test to fail.

The other solution would have been to add a conditional setting, but that
could introduce unexpected results in future tests. Skipping this test is
the safer, more conservative approach.