Kraken: fix initialization of VisitorFinalJppAndDate
Kraken: translation of borne to bound
Kraken: clear of raptor: reinitialize variable
Merge pull request #371 from l-vincent-l/fix_init_raptor_solution_visitor

Kraken: fix initialization of VisitorFinalJppAndDate
Kraken: don't pass data to clear
Merge pull request #373 from l-vincent-l/small_improvement_on_clear

Small improvement on clear