Insteon debug logging with new Openhab2.2

I am trying to setup logging for InsteonPLM binding on my Openhab2 system. How do you set this up now that Openhab is using log4j2. I tried the setup listed in the insteonplm 1.8 troubleshooting section, and didn’t get anything. I tried several changes attempting to figure out the log4j2 definitions. Nothing seems to work. Are there any suggestions for setting up debug logging for InsteonPLM?

Openhab2 on an openhabian system (RaspberryPI 3). Running version: openhab 2.2.0-1