[1.7.x] Skipped a broken GIS test on Oracle; refs #23504.

Backport of 828edc5ba9 from master

django/contrib/gis/tests/relatedapp/tests.py

@@ -207,6 +207,8 @@ class RelatedGeoModelTest(TestCase):
             self.assertEqual(val_dict['id'], c_id)
             self.assertEqual(val_dict['location__id'], l_id)
 
+    # TODO: fix on Oracle -- qs2 returns an empty result for an unknown reason
+    @no_oracle
     def test10_combine(self):
         "Testing the combination of two GeoQuerySets.  See #10807."
         buf1 = City.objects.get(name='Aurora').location.point.buffer(0.1)