kmsbasertpendpoint: add mid attr when bundle
kmsbasertpendpoint: add mid attr when bundle

Change-Id: I1dc51f7f18841c651e11abf8047f713133c23c18

shelsonjava/kms-core,Kurento/kms-core,Kurento/kms-core,ESTOS/kms-core,TribeMedia/kms-core,shelsonjava/kms-core,Kurento/kms-core,ESTOS/kms-core,ESTOS/kms-core,TribeMedia/kms-core,shelsonjava/kms-core,ESTOS/kms-core,TribeMedia/kms-core,TribeMedia/kms-core,shelsonjava/kms-core,Kurento/kms-core