gstsctpclientsink: Remove pad when it is released
gstsctpclientsink: Remove pad when it is released

Change-Id: Icd654e0dedc6571858431db37b639013e431b5e0

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