Events clogging up the log

I am trying to follow the link followed here: Taming openHAB 2 Logging

I am new to the modbus binding and it keeps clogging up my fronttail log, so I tried to remove it from logging by adding this to log configuration:

# modbus logger
log4j.logger.org.openhab.binding.modbus = TRACE, modbus, osgi:*
log4j.additivity.org.openhab.binding.modbus = false


# File appender - modbus.log
log4j.appender.modbus=org.apache.log4j.RollingFileAppender
log4j.appender.modbus.layout=org.apache.log4j.PatternLayout
log4j.appender.modbus.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} [%-26.26c{1}] - %m%n
log4j.appender.modbus.file=${openhab.logdir}/modbus.log
log4j.appender.modbus.append=true
log4j.appender.modbus.maxFileSize=10MB
log4j.appender.modbus.maxBackupIndex=10

But it stills spit out several messages per seconds, even thoug in the modbus config I have set it to 5000ms : serial.vvrot.connection=/dev/ttyUSB1:19200:8:none:1:rtu:35:5000

2018-11-04 23:25:51.326 [vent.ItemStateChangedEvent] - VillaventClockS changed from 50 to 51

2018-11-04 23:25:51.385 [vent.ItemStateChangedEvent] - VillaventClock changed from 2018-11-04T23:25:50.000+0100 to 2018-11-04T23:25:51.000+0100

2018-11-04 23:25:51.470 [vent.ItemStateChangedEvent] - VillaventSupplyFanRpm changed from 5400 to 5460

2018-11-04 23:25:51.477 [vent.ItemStateChangedEvent] - VillaventExtractFanRpm changed from 2160 to 2100

2018-11-04 23:25:52.765 [vent.ItemStateChangedEvent] - VillaventDigital6 changed from OFF to ON

2018-11-04 23:25:52.830 [vent.ItemStateChangedEvent] - VillaventClockS changed from 51 to 53

2018-11-04 23:25:52.893 [vent.ItemStateChangedEvent] - VillaventClock changed from 2018-11-04T23:25:51.000+0100 to 2018-11-04T23:25:53.000+0100

2018-11-04 23:25:52.970 [vent.ItemStateChangedEvent] - VillaventExtractFanRpm changed from 2100 to 2160

2018-11-04 23:25:53.058 [vent.ItemStateChangedEvent] - VillaventIntakeAirTemp_in changed from 152 to 153

2018-11-04 23:25:53.078 [vent.ItemStateChangedEvent] - VillaventIntakeAirTemp changed from 15.2 to 15.3

2018-11-04 23:25:54.217 [vent.ItemStateChangedEvent] - VillaventDigital6 changed from ON to OFF

2018-11-04 23:25:54.334 [vent.ItemStateChangedEvent] - VillaventClockS changed from 53 to 54

What am I doing wrong?

ItemStateChangedEvents come from the org.eclipse.smarthome.core package.

How do I apply

to my config file?