DDF add ubisys C4
DDF add ubisys C4

Support "auto" group handling like for Kobold.
Todo:
[] check if device setup attribute needs to be written. The C++ version looks incomplete.
dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin