message: Use explicit type instead of `auto` in an InOutOctree class
  Per PR suggestion.
diff: @@ -2634,8 +2634,8 @@ private:
  // Add the fields to the mint mesh
  - auto* vertID = addIntField(debugMesh, "vertID" );
  - auto* lLevel = addIntField(debugMesh, "level" );
  + axom::IndexType* vertID = addIntField(debugMesh, "vertID" );
  + axom::IndexType* lLevel = addIntField(debugMesh, "level" );
  axom::IndexType* blockCoord[3];
  blockCoord[0] = addIntField(debugMesh, "block_x" );
  @@ -2654,8 +2654,8 @@ private:
  if(hasTriangles)
  {
  - auto* uniqVertID = addIntField(debugMesh, "uniqVertID" );
  - auto* triCount = addIntField(debugMesh, "triCount" );
  + axom::IndexType* uniqVertID = addIntField(debugMesh, "uniqVertID" );
  + axom::IndexType* triCount = addIntField(debugMesh, "triCount" );
  for ( int i=0 ; i < leafSet.size() ; ++i )
  {
  @@ -2666,7 +2666,7 @@ private:
  if(hasColors)
  {
  - auto* colors = addIntField(debugMesh, "colors" );
  + axom::IndexType* colors = addIntField(debugMesh, "colors" );
  for ( int i=0 ; i < leafSet.size() ; ++i )
  colors[i] = leafColors[i];
  }
  @@ -2697,7 +2697,7 @@ private:
  int numTris = tris.size();
  // Index of each triangle within the mesh
  - auto* triIdx = addIntField(debugMesh, "triangle_index" );
  + axom::IndexType* triIdx = addIntField(debugMesh, "triangle_index" );
  // Indices of the three boundary vertices of this triangle
  axom::IndexType* vertIdx[3];
  