Add cifar100 to scenario

Author: celinejacques

mplc/scenario.py

@@ -138,6 +138,8 @@ def __init__(
                 self.dataset = dataset_module.Esc50()
             elif dataset_name == constants.IMDB:
                 self.dataset = dataset_module.Imdb()
+            elif dataset_name == constants.CIFAR100:
+                self.dataset = dataset_module.Cifar100()
             else:
                 raise Exception(
                     f"Dataset named '{dataset_name}' is not supported (yet). You can construct your own "