reduce max step

config/ppo_transfer/3DBallHard.yaml

         gamma: 0.995
         strength: 1.0
     keep_checkpoints: 5
-    max_steps: 4000000
+    max_steps: 1000000
     time_horizon: 1000
     summary_freq: 12000
     threaded: true

config/ppo_transfer/3DBallHardTransfer.yaml

         gamma: 0.995
         strength: 1.0
     keep_checkpoints: 5
-    max_steps: 4000000
+    max_steps: 1000000
     time_horizon: 1000
     summary_freq: 12000
     threaded: true