add token authentication for testproject

This MR adds a token authentication for the testproject based on the token generation of djangos rest framework (note that there are multiple authentication schemes around). The token authentication here should rather serve as a proof of concept for the authentication in the dasf-messaging-framework that I implemented in dasf-messaging-python!39.

To test this setup @daniel.eggert, you need to

1. git fetch origin
2. git checkout token-authentication
3. pip install .[dev]
4. python manage.py migrate
5. python manage.py drf_create_token <your-superuser-account>

This will print out a token that you can use for authentication with the --header attribute (see above-mentioned MR)