Make tests/datatests/test_new_tasks.py work (#3167)

* Make tests/datatests/test_new_tasks.py work

Values were there, just the format changed slightly.

Tested/debugged by changing
  `parlai/tasks/jsonfile/agents.py`
to load in the example json file colocated in the same directly.

Printed the results of `verify(opt)` as well as the `KEYS` object; that made it clear-ish what ought to be happening.

* lint

tests/datatests/test_new_tasks.py

@@ -59,14 +59,18 @@ def test_verify_data(self):
                 opt['task'] = subt
                 try:
                     with testing_utils.capture_output():
-                        text, log = verify(opt)
+                        verify_results = verify(opt)
                 except Exception:
                     found_errors = True
                     traceback.print_exc()
                     print("Got above exception in {}".format(subt))
                 for key in KEYS:
-                    if log[key] != 0:
-                        print('There are {} {} in {}.'.format(log[key], key, subt))
+                    if verify_results[key] != 0:
+                        print(
+                            'There are {} {} in {}.'.format(
+                                verify_results[key], key, subt
+                            )
+                        )
                         found_errors = True
 
         if found_errors: