Add a successCallback to processSdpAnswer
Add a successCallback to processSdpAnswer

Change-Id: I934e1df0623cad07faf0c2d1e38ca3dc011cc563

shelsonjava/kurento-utils-js,lcamacho/kurento-utils-js,shelsonjava/kurento-utils-js,lcamacho/kurento-utils-js