Remove corrections
Merge branch 'correction'
Merge branch 'correction'
Another fix to test etudiant
Implement Save and Load
Change after and before Etudiant signature
Refactor to get property connection factorized
Implement Etudiant after and before
Revert "Remove corrections"

This reverts commit 2b78aa774487279e7a9a7a6eae3229b316ca44a0.