This way we get VTY parsing failures as well as backtraces upon process crash. Related: OS#4212 Change-Id: I9493ff73ef27c7c6d32b00cf827704b3f9cbf86a
this will be used in upcoming TTCN-3 tests for osmo-remsim Change-Id: I8508441289455d0a2e3486a99ef09c85937de26f