updated configs and run files

Changing config files to use SGD instead of Adams. Adding script that runs tests 5 times for different seeds. Added 200 seconds sleep in between rounds.

eval/step_configs/config_shakespeare_subsampling.ini

+[DATASET]
+dataset_package = decentralizepy.datasets.Shakespeare
+dataset_class = Shakespeare
+random_seed = 97
+model_class = LSTM
+train_dir = /mnt/nfs/shared/leaf/data/shakespeare/per_user_data/train
+test_dir = /mnt/nfs/shared/leaf/data/shakespeare/data/test
+; python list of fractions below
+sizes =
+
+[OPTIMIZER_PARAMS]
+optimizer_package = torch.optim
+optimizer_class = SGD
+lr = 0.1
+
+[TRAIN_PARAMS]
+training_package = decentralizepy.training.Training
+training_class = Training
+rounds = 10
+full_epochs = False
+batch_size = 16
+shuffle = True
+loss_package = torch.nn
+loss_class = CrossEntropyLoss
+
+[COMMUNICATION]
+comm_package = decentralizepy.communication.TCP
+comm_class = TCP
+addresses_filepath = ip_addr_6Machines.json
+
+[SHARING]
+sharing_package = decentralizepy.sharing.SubSampling
+sharing_class = SubSampling
+alpha = 0.1