[1.6.x] Fixed an ImportError in `django.core.cache.backends.db`
[1.6.x] Fixed an ImportError in `django.core.cache.backends.db`

It was introduced by a979a2fea5.

dex4er/django,redhat-openstack/django,felixjimenez/django,felixjimenez/django,django-nonrel/django,redhat-openstack/django,felixjimenez/django,django-nonrel/django,dex4er/django,redhat-openstack/django,django-nonrel/django,redhat-openstack/django,dex4er/django,django-nonrel/django,felixjimenez/django