some flake8 cleanups, more to do
some flake8 cleanups, more to do

bcornec/python-redfish,uggla/python-redfish,devananda/python-redfish,uggla/python-redfish,bcornec/python-redfish,bcornec/python-redfish,vmisson/python-redfish,vmisson/python-redfish,devananda/python-redfish,uggla/python-redfish