When testing the following two endpoints, I get different results for the array of owners and tags. The former should be identical to the response of the latter endpoint.

`/api/v1/dags/{dag_id}/details`:

```json
{

  "owners": [],
  "tags": [
    {},
    {}
  ],
}
```

`/api/v1/dags/{dag_id}`:

```json
{

  "owners": [
    "airflow"
  ],
  "tags": [
    {
      "name": "example"
    },
    {
      "name": "example2"
    }
  ]
}
```
tests/api_connexion/schemas/test_dag_schema.py
dag_id="test_dag",
            start_date=datetime(2020, 6, 19),
            doc_md="docs",
            orientation="LR",
            default_view="duration",
            params={"foo": 1},
        )
        schema = DAGDetailSchema()
        expected = {
            'catchup': True,
            'concurrency': 16,
            'dag_id': 'test_dag',
            'dag_run_timeout': None,
            'default_view': 'duration',
            'description': None,
            'doc_md': 'docs',
            'fileloc': __file__,
            "file_token": SERIALIZER.dumps(__file__),
            'is_paused': None,
            'is_subdag': False,
            'orientation': 'LR',
            'owners': [],
            'params': {'foo': 1},
            'schedule_interval': {'__type': 'TimeDelta', 'days': 1, 'seconds': 0, 'microseconds': 0},
            'start_date': '2020-06-19T00:00:00+00:00',
            'tags': None,
            'timezone': "Timezone('UTC')",
        }
        assert schema.dump(dag) == expected