This will make sure that all log files will contain information about
the .ttcn source file name and line number that has caused the log,
which is extremely useful during debugging.
Change-Id: Id6785757f20279ba84b34747f878baf67d065b20
In commit 0b7545dff1 I accidentially
committed incomplete support for user plane (GTP-U) testing to
the GGSN test.
This code has caused the jenkins tests since August 26th to fail,
let's revert it until this is fully implemented + tested.