[BUG] homebridge v1.3.2 causes warning in logging about Password Setting set to null
When updating to homebridge v1.3.2  with homebridge-harmony v1.5.1 it creates the following error in the log:

[homebridge-harmony] This plugin generated a warning from the characteristic 'Password Setting': characteristic was supplied illegal value: null! Home App will reject null for Apple defined characteristics. See https://git.io/JtMGR for more info.

i have not configured any password in the configuration

