3D ball reset parameter implementation ported over

UnitySDK/Assets/ML-Agents/Examples/3DBall/Scenes/3DBallHard.unity

   m_ReflectionIntensity: 1
   m_CustomReflection: {fileID: 0}
   m_Sun: {fileID: 0}
-  m_IndirectSpecularColor: {r: 0.45096254, g: 0.5008292, b: 0.5744089, a: 1}
+  m_IndirectSpecularColor: {r: 0.45096314, g: 0.50082976, b: 0.57440954, a: 1}
 --- !u!157 &3
 LightmapSettings:
   m_ObjectHideFlags: 0
     timeScale: 1
     targetFrameRate: -1
   resetParameters:
-    resetParameters: []
+    resetParameters:
+    - key: mass
+      value: 1
+    - key: gravity
+      value: 9.81
+    - key: scale
+      value: 1
 --- !u!1001 &1591880668
 Prefab:
   m_ObjectHideFlags: 0