com.sun.star.sdbc.SQLException ErrorCode field.

Patch by: me

(cherry picked from commit ecd7e16c)

Change-Id: I45fb25f1447fd6d37a38e80879de663ab3dbba99
Reviewed-on: https://gerrit.libreoffice.org/41568Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>