0033498: Data Exchange, Step Export - Meshed pretessellated geometry is skipped on...

0033498: Data Exchange, Step Export - Meshed pretessellated geometry is skipped on write

Processing of complex_triangulated_surface_set is added to
  STEPCAFControl_GDTProperty::GetTessellation().
Processing of tessellated_curve_set is refactored and moved to a
  separate function.

Problems related to normals list are fixed in
RWStepVisual_RWComplexTriangulatedSurfaceSet::WriteStep():
  Normals list is now checked for nullptr. It is a valid situation that
  occurs when complex_triangulated_surface_set in STEP file has no
  normals.
  Traversing of normals list is performed in correct order. Previously
  rows and columns were switched, which led to crashes or incorrect data.