Can't benchmark on medqa

[Julien Vignoud]

In the evaluation folder, running python inference.py --checkpoint mistral --checkpoint_name mistral --benchmark medqa fails with the error datasets.exceptions.DatasetGenerationError: An error occurred while generating the dataset.

I managed to fix the error by setting the MedQA benchmark attribute self.subsets = ['med_qa_en_source]

By the way, the repository requirements.txt is missing the packages wandb, scikit-learn and openai (unused though), to be able to run the benchmark suite.

[rjun]

Thanks!