kmsrtpendpoint: rename rtp_endpoint vars to self
kmsrtpendpoint: rename rtp_endpoint vars to self

Change-Id: I0babcf0e36bc96a1a40b64b106ac8e1e7a019f86

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