Merge pull request #1472 from Unity-Technologies/release-v0.6-bananaRL-player-brain

Made the default brains of the BananaRL prefab the Player brain

UnitySDK/Assets/ML-Agents/Examples/BananaCollectors/Prefabs/RLArea.prefab

   m_Script: {fileID: 11500000, guid: 700720465a0104fa586fa4a412b044f8, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  brain: {fileID: 11400000, guid: 9e7865ec29c894c2d8c1617b0fa392f9, type: 2}
+  brain: {fileID: 11400000, guid: dff7429d656234fed84c4fac2a7a683c, type: 2}
   agentParameters:
     agentCameras: []
     maxStep: 5000