Rename hand skeleton prefabs (why were there two identical prefabs?)

Author: keveleigh

Assets/MRTK/SDK/StandardAssets/Controllers/DebugControllers/HandSkeletonLeft.prefab renamed to Assets/MRTK/SDK/StandardAssets/Controllers/DebugControllers/HandSkeleton.prefab

@@ -11,7 +11,7 @@ GameObject:
   - component: {fileID: 4298320384799128}
   - component: {fileID: 114324826223023798}
   m_Layer: 0
-  m_Name: HandSkeletonLeft
+  m_Name: HandSkeleton
   m_TagString: Untagged
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0

Assets/MRTK/SDK/StandardAssets/Controllers/DebugControllers/HandSkeletonLeft.prefab.meta renamed to Assets/MRTK/SDK/StandardAssets/Controllers/DebugControllers/HandSkeleton.prefab.meta

@@ -11,7 +11,7 @@ GameObject:
   - component: {fileID: 4622400267148976}
   - component: {fileID: 114037441043972360}
   m_Layer: 0
-  m_Name: HandSkeletonRight
+  m_Name: ObsoleteHandSkeleton
   m_TagString: Untagged
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0