kmsplumberendpoint: Provide object in debug messages
kmsplumberendpoint: Provide object in debug messages

Change-Id: I3cd1ca38ce226647ac31de01d3489aac43b58d47

Kurento/kms-elements,TribeMedia/kms-elements,TribeMedia/kms-elements,TribeMedia/kms-elements,shelsonjava/kms-elements,Kurento/kms-elements,Kurento/kms-elements,shelsonjava/kms-elements,shelsonjava/kms-elements