kmstreebin: Use new helper function to add a new event callback
kmstreebin: Use new helper function to add a new event callback

Change-Id: I486bc1c6d61b0b9670b17b0bb1f9fc05fc66fb22

Kurento/kms-core,Kurento/kms-core,ESTOS/kms-core,ESTOS/kms-core,ESTOS/kms-core,ESTOS/kms-core,Kurento/kms-core,Kurento/kms-core