Add a broken test that shows extensions not skipped

test/units/TestInventory.py

@@ -439,3 +439,7 @@ class TestInventory(unittest.TestCase):
         actual_host_names = [host.name for host in group_greek]
         print "greek : %s " % actual_host_names
         assert actual_host_names == ['zeus', 'morpheus']
+
+    def test_dir_inventory_skip_extension(self):
+        inventory = self.dir_inventory()
+        assert 'skipme' not in [h.name for h in inventory.get_hosts()]

test/units/inventory_test_data/inventory_dir/4skip_extensions.ini

+[skip]
+skipme
\ No newline at end of file