[1.6.x] Designated Django 1.8 as the next LTS.
[1.6.x] Designated Django 1.8 as the next LTS.

Backport of c38db4d7e072e9a5002cb4897d9104e5eaa292ed from master

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