Update existing tests for new CLIN logic

- Factory adds total_amount field, which is always greater than obligated
field
- add total_amount field on tests that create TOs manually
- update tests that calculate total_contract_amount and
total_obligated_amount

tests/test_access.py

@@ -530,6 +530,7 @@ def test_task_orders_new_post_routes(post_url_assert_status):
                 "clins-0-start_date": "01/01/2020",
                 "clins-0-end_date": "01/01/2021",
                 "clins-0-obligated_amount": "5000",
+                "clins-0-total_amount": "10000",
             },
         ),
     ]