implement database sessions for test factories

tests/domain/test_task_orders.py

@@ -6,20 +6,8 @@ from atst.domain.task_orders import TaskOrders
 from tests.factories import TaskOrderFactory
 
 
-@pytest.fixture(scope="function")
-def new_task_order(session):
-    def make_task_order(**kwargs):
-        to = TaskOrderFactory.create(**kwargs)
-        session.add(to)
-        session.commit()
-
-        return to
-
-    return make_task_order
-
-
-def test_can_get_task_order(new_task_order):
-    new_to = new_task_order(number="0101969F")
+def test_can_get_task_order():
+    new_to = TaskOrderFactory.create(number="0101969F")
     to = TaskOrders.get(new_to.number)
 
     assert to.id == to.id