upgrade swagger to 1.5.12 and fix related dependencies
upgrade swagger to 1.5.12 and fix related dependencies

Signed-off-by: riccardomodanese <7c1355875875c0ddf558ea40fa3be24d48eb19a1@eurotech.com>

LeoNerdoG/kapua,LeoNerdoG/kapua,stzilli/kapua,LeoNerdoG/kapua,LeoNerdoG/kapua,stzilli/kapua,stzilli/kapua,stzilli/kapua,stzilli/kapua,LeoNerdoG/kapua