Changes

ttcn3-msc-test: fix osmo-msc.cfg: make it work with latest

Unfortunately, we have to revert a part of change [1], because it
broke ttcn3-msc-test-latest. The reason is that the latest release
of osmo-msc does not support 'timer vlr T3212 30'.

Change-Id: Iaeb6f1ffee9286394654bc3cf9d985ace7829110