[1.6.x] Made a GIS test work on Oracle.
[1.6.x] Made a GIS test work on Oracle.

Thanks Josh Smeaton and Claude Paroz for advice.

Backport of 7add30df01 from master

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