Comment 1 for bug 1532048

Capping django_compressor<2.0 in stable/kilo g-r:

https://review.openstack.org/#/c/265026/

The breaking change was https://github.com/django-compressor/django-compressor/commit/671cf7dce2a9c5c42e2d2c4b8bfc82dcfbcd064a which drops support for django<1.8 and that's what we have django capped at in stable/kilo g-r.