Reduce num steps for walljump (#3377)

config/sac_trainer_config.yaml

     num_layers: 2
 
 SmallWallJump:
-    max_steps: 3e7
+    max_steps: 5e6
     hidden_units: 256
     summary_freq: 20000
     time_horizon: 128
 
 BigWallJump:
-    max_steps: 3e7
+    max_steps: 2e7
     hidden_units: 256
     summary_freq: 20000
     time_horizon: 128

config/trainer_config.yaml

     num_layers: 2
 
 SmallWallJump:
-    max_steps: 3e7
+    max_steps: 5e6
     batch_size: 128
     buffer_size: 2048
     beta: 5.0e-3
     normalize: false
 
 BigWallJump:
-    max_steps: 3e7
+    max_steps: 2e7
     batch_size: 128
     buffer_size: 2048
     beta: 5.0e-3