Feature/151 uniformly manage seeds 2

[MdePonnat]

✒️ Context

We can't give a random seed to the models. This fixes it. The template vision is not included in this PR since it requires updated version of tensorflow

• What kind of change does this PR introduce ?

  • [ ] Bugfix
  • [x] Feature
  • [ ] Refactoring
  • [ ] Other, please describe:

🧱 Description of Changes

• Add bullet points summarizing your changes here

  • [x] This is a change for the NLP template
  • [x] This is a change for the NUM template
  • [ ] This is a change for the VISION template
  • [ ] This is a change for the API template
  • [ ] This changes how templates are generated (i.e. a Jinja change)

🩺 Testing

• Add bullet points summarizing your changes here

  • [ ] This change does not need new tests
  • [x] Added/Updated unit tests
  • [ ] Added/Updated functionals tests (i.e. e2e)

🔗 References

Does this depend on other work, documents, or tickets?

• Issue: Closes #151 . Might also close #60 (to check before merging)

---

Contribution License Agreement

By submitting this pull request you agree that all contributions to this project are made under the GNU AFFERO GENERAL PUBLIC LICENSE.