Added samples to new configs

baselines/global_obs_ppo/global_obs_ppo.yaml

@@ -7,6 +7,7 @@ flatland-sparse-global-conv-ppo:
     checkpoint_at_end: True
     keep_checkpoints_num: 100
     checkpoint_score_attr: episode_reward_mean
+    num_samples: 3
     config:
         clip_rewards: True
         clip_param: 0.1

baselines/local_conflict_obs_apex/local_conflict_obs_apex.yaml

@@ -7,6 +7,7 @@ flatland-random-sparse-small-tree-fc-ppo:
     checkpoint_at_end: True
     keep_checkpoints_num: 100
     checkpoint_score_attr: episode_reward_mean
+    num_samples: 3
     config:
         num_workers: 13
         num_envs_per_worker: 5