Changes from Alex:

Author: Aliaksandr Merzianiou <aliaksandr.merzianiou@epol-it.com>
Date:   Thu Jun 5 15:37:22 2025 +0200

    Json schema and unittests fixes

Change-Id: Iff28eedf89a9da66b5e5a1caa1b1604b31620b9d
Signed-off-by: József Gyürüsi <jozsef.gyurusi@ericsson.com>