Unskip some tests
Add failing test for django-cache-machine uprade (bug 883477)
Replace all '.uncached' calls by '.objects.no_cache()' (bug 913010)

uncached is generic and therefore wrong everytime we have soft
deletion or when there is model inheritance involved.

It's better to remove it and use the regular objects manager with
a no_cache() added to disable cache-machine.
Merge pull request #1100 from diox/models-uncached-weirdness

Replace all '.uncached' calls by '.objects.no_cache()' (bug 913010)