httpendpoint: Set a dedicated callback to emit signal new-sample signal
httpendpoint: Set a dedicated callback to emit signal new-sample signal

Change-Id: I224a36f72b395c9d583261de58dd475027e84fd4

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