ttcn3-s1gw-test: update logging config in osmo-s1gw.configBring logging configuration in sync with erlang/osmo-s1gw.git.Change-Id: I3853c40c94d3ee2bbd5d6f6b345bfd87cce134d0Related: erlang/osmo-s1gw.git Ib88801b8d38976b98a02ed06e1638e0e9056bafb