it has been deprecated in libosmocore.git 2.5 years ago:
commit 7e0686c6b4b456ec4e6e15689694b1bcf96c301f
Author: Neels Hofmeyr <neels@hofmeyr.de>
Date: Mon Sep 10 20:58:52 2018 +0200
Change-Id: Ieb9e958278e7bb9d5e798f83b70dcb873a25d06d
Update MSC_Tests.default according to the current MSC_Tests.cfg
used by docker-playground.
Add osmo-msc.cfg and osmo-stp.cfg example configuration files.
Allows the MSC tests to be run locally.
Change-Id: Ia00f0315a5246c3ec55563ebd21a586aec8e4688