jurt: use new exception constructors

Change-Id: I58e7ebdd5c48094142f93f47271bcc0cc8b97981
Reviewed-on: https://gerrit.libreoffice.org/11892
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>