kmssctpclientrpc: Use methods and attributes provided by base class
kmssctpclientrpc: Use methods and attributes provided by base class

Change-Id: Ia827288d8ffeb5a3f9a72b37a10ddfec87a54216

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