dbusmonitor.get_service_list(): swapped keys and values in return dict
dbusmonitor.get_service_list(): swapped keys and values in return dict

The initial setup had a thinking error: instances from different types
of dbusservices are not unique. For example there is a big chance of
having a solarcharger with instance 0 and a vebus-system with instance
0. The dbus-servicenames are unique, so it is better to make that the
key.

victronenergy/velib_python,quinox/velib_python