Upgrade XStream to 1.4.17 (from 1.4.16)
Upgrade XStream to 1.4.17 (from 1.4.16)

baldimir/optaplanner,tkobayas/optaplanner,baldimir/optaplanner,baldimir/optaplanner,tkobayas/optaplanner,tkobayas/optaplanner,tkobayas/optaplanner,baldimir/optaplanner