tentative working Django 1.7.1 (bug 935538)

* wip don't merge
* removed funfactory and test_utils

- [x] tests seem a bit slower, mocking might be failing
- [x] need to check on the django-tastypie pinning
- [x] need to run baked
It could be `solitude.settings.test` would have no problem moving the file, it will be inconsistent with webpay and zamboni though, perhaps we should change webpay though.