this is an example where StringIO.communicate has to be extended
Change-Id: Iff6bb426ee7960904993574531de84793152e21d
Reviewed-on: https://forge.frm2.tum.de/review/c/secop/frappy/+/32385
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>
