Add devolo 2020 copyright header template. (#984)
Add devolo 2020 copyright header template. (#984)

Signed-off-by: Sergey Gerasimov <3057e99fe87efb85975b367d50a4547c2cead747@devolo.de>
bsinno/hawkbit,bsinno/hawkbit,eclipse/hawkbit,eclipse/hawkbit,bsinno/hawkbit,eclipse/hawkbit,eclipse/hawkbit