adds FLAUBERT to doc tests
# What does this PR do?

adds FLUABERT to doc tests


Hi, @abdouaziz

Since `Flaubert` is not to be changed, and I guess you won't work on `CamemBERT` neither (right?), the changes in those 2 files have to be reverted to its original version :-) Thank you.<|||||>It also looks like you local clone and working branch doesn't have the recent update of HF `transformers`, which is necessary for this sprint. Maybe you could try to pull the latest change and rebase your working branch?

