Eox-tenant

Fixed

- Changed OAUTH2_PROVIDER test setting to the platform value

Changed

- **BREAKING CHANGE**: Default backends for edxapp users and branding_api are not compatible with Juniper.

Features

- Set Lilac backends as default in the Common settings file.
- Update readme with new information and formats.

Removed

- Remove python 2.7 support.

Features

- Lilac backends.

Features

- Python 3.8 tests

Features

- Add allowed application in order to avoid the site restrictions when a token is created.

Fixed

- Studio error setting.

Features

- New oauth2 validator in order to restrict the tokens creation.