SimQPN.sh returns all output in stdout

[duelle]

When running SimQPN.sh from the command line, all the outputs go to stdout while stderr stays empty
As a result, all errors and stacktraces that are printed while starting the environment also go to the resulting output (file).

Therefor, to only obtain the relevant information when running the CLI, it is necessary to split/filter the resulting file.

It would be desirable that all warning/error messages from the Eclipse ecosystem would go to stderr and only the QPME- and simulation-specific output would go to stdout.