Since Ib2335d02ea545aff837aadd49f15b2fdb418c46e, this VTY option
is deprecated in osmo-bsc, so let's actualize the config files.
Change-Id: I709e1afd2a9cccdc92eec312dff607947a10c299
This is required by later versions of the osmo-ttcn3-hacks BTS
test suite after Change-Id I2a42531dc5555ab4772d538fda462343605b8feb
Change-Id: I229000ce7609845fdf24cafe1f5ec2bfa3f507e8