Hello,
seem we have found workaround. After adding libs, oxauth.xml was edited according to jetty 10 syntax. v10 dtd added,a dded libs separated by comma not tags, changed property tag name to J10 style etc. Also strange observation, its important to do stop/start and not restart. Later leads to same xml parsing problems described above. No explanation for that.
I guess we can close the ticket. Thank you