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
Rather than using the more complex RSL Emulation and BSSAP emulation
components, we attach to the RSL and BSSAP Codec Ports and send some
messages back and forth for low-level testing such as timeouts, response
to RACH requests, failure of MSC to react to CR requests, etc.