Added event oncandidategatheringdone
Added event oncandidategatheringdone

Change-Id: I9a9bffaaaa4f865f01e8f095b818f0794fc012d7

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