add default value for mod_type in process_event
add default value for mod_type in process_event

h2020-endeavour/iSDX,h2020-endeavour/iSDX,h2020-endeavour/iSDX,h2020-endeavour/iSDX,h2020-endeavour/iSDX,h2020-endeavour/iSDX,h2020-endeavour/iSDX