fix flake8 after lib update (#1622)
fix flake8 after lib update (#1622)


petrjasek/superdesk-core,superdesk/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core,petrjasek/superdesk-core,superdesk/superdesk-core