Enable repeat action for crawler and walker

UnitySDK/Assets/ML-Agents/Examples/Crawler/Prefabs/DynamicPlatform.prefab

   m_EditorClassIdentifier: 
   agentParameters:
     maxStep: 5000
-    onDemandDecision: 0
-    numberOfActionsBetweenDecisions: 5
   target: {fileID: 4490950947783742}
   ground: {fileID: 4684408634944056}
   detectTargets: 1
   m_Name: 
   m_EditorClassIdentifier: 
   DecisionPeriod: 5
-  RepeatAction: 0
+  RepeatAction: 1
+  offsetStep: 0
 --- !u!1 &1520563409393552
 GameObject:
   m_ObjectHideFlags: 0

UnitySDK/Assets/ML-Agents/Examples/Crawler/Prefabs/FixedPlatform.prefab

   m_EditorClassIdentifier: 
   agentParameters:
     maxStep: 5000
-    onDemandDecision: 0
-    numberOfActionsBetweenDecisions: 5
   target: {fileID: 4749909135913778}
   ground: {fileID: 4856650706546504}
   detectTargets: 0
   m_Name: 
   m_EditorClassIdentifier: 
   DecisionPeriod: 5
-  RepeatAction: 0
+  RepeatAction: 1
+  offsetStep: 0
 --- !u!1 &1492926997393242
 GameObject:
   m_ObjectHideFlags: 0

UnitySDK/Assets/ML-Agents/Examples/Walker/Prefabs/WalkerPair.prefab

     vectorActionSize: 27000000
     vectorActionDescriptions: []
     vectorActionSpaceType: 1
-  m_Model: {fileID: 11400000, guid: 4e86a19e012da43bfa5ab97ae8089b98, type: 3}
+  m_Model: {fileID: 11400000, guid: b35339ef598b444be935f46ccf143440, type: 3}
   m_InferenceDevice: 0
   m_BehaviorType: 0
   m_BehaviorName: Walker
   m_EditorClassIdentifier: 
   agentParameters:
     maxStep: 5000
-    onDemandDecision: 0
-    numberOfActionsBetweenDecisions: 5
   target: {fileID: 4085853164035250}
   hips: {fileID: 4333477265252406}
   chest: {fileID: 4027052323869384}
   m_Name: 
   m_EditorClassIdentifier: 
   DecisionPeriod: 5
-  RepeatAction: 0
+  RepeatAction: 1
+  offsetStep: 0
 --- !u!1 &1907539933197724
 GameObject:
   m_ObjectHideFlags: 0