MM7 Log Conversion Hook
This hook logs message conversion from or to an MM7 SOAP message. The default logger implementation will either log the event as "mm7 to ec_message" or "ec_message to mm7", based on the value of
recv_method in the ec_message. If the ec_message originates from a MM7 endpoint—the
P_MM7—"mm7 to ec_message" is logged. Otherwise, "ec_message to mm7" is logged. Overwrite this hook if you want to log message conversion differently.