Add support of following SUPANN attributes:
- supannEtuDiplome
- supannEtuElementPedagogique
- supannEtuEtape
- supannEtuRegimeInscription
- supannEtuSecteurDisciplinaire
- supannEtuTypeDiplome
For each, a new specific LSattr_html & LSformElement class was added,
and a function is provided to generate then from supannEtuInscription
attribute values.
