kmsplumberendpoint: Remove useless "if" statement

Change-Id: If46622843ef23e1041d417df13b081bc9fa8abd5
kmsplumberendpoint: Provide object in debug messages

Change-Id: I3cd1ca38ce226647ac31de01d3489aac43b58d47
gstsctpserversrc: Timestamp buffers if do_timestamp is enabled

Change-Id: I9c3d8537bd1cc3c46c5195b8e05cf72c88b96350