[traversal] Fix methods BVTesting of derived classes.

  Methods BVTesting with sqrDistLowerBound as output argument were not defined.
  Instead the implementation of the base class BVHCollisionTraversalNode <BV>
  was called instead. Unfortunately, in the base class, the meshes and
  bounding volume hierarchy were moved to the position given for collision
  testing, but not in the derived classes. Method overlap were then called with
  wrong argument for position and orientation.