Fix: Flake8 seems to have changed. This fixes a code style issue in an old...

Fix: Flake8 seems to have changed. This fixes a code style issue in an old file preventing the CI to succeed.

Change-Id: I0e48166df7a24b53fa3215241d9b515fdd6343b5
Signed-off-by: peusterm <manuel.peuster@uni-paderborn.de>