Michael Pöhn authored May 15, 2024 and Jochen Sprickerhof committed Jul 25, 2024

When scanner.py::ScannerTool is instatiated but the calling code was
started by a call to e.g. `build.py` ScannerTool will crash. This change
makes it so that ScannerTool will intializes with a default value
instead of crashing when triging to access a non existen cli argument.

also see #1212