More unit tests
Add new unit tests (@remi.cresson):
- .gitlab-ci jobs
- c++ build from OTB+TF docker image
- Python static analysis (pylint + flake8)
- model train
New test to do (todo @nicolas.narcon )
- Tester la super resolution (lien)
- Tester les modèles du Tutoriel (https://github.com/remicres/otbtf_tutorial_resources)
Ajouter les tests au CMakeLists directement dans la branche migration-tf2