[1.6.x] Fixed #21325 -- Added missing argument to permission_required decorator.
[1.6.x] Fixed #21325 -- Added missing argument to permission_required decorator.

Backport of cc2049cdd7 from master

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