FS-9635: update deprecated stream.onended

stream.onended is being removed in Chrome 54, update to
stream.oninactive

html5/verto/js/src/jquery.FSRTC.js

@@ -729,7 +729,7 @@
             var remoteMediaStream = event.stream;
 
             // onRemoteStreamEnded(MediaStream)
-            remoteMediaStream.onended = function() {
+            remoteMediaStream.oninactive = function () {
                 if (options.onRemoteStreamEnded) options.onRemoteStreamEnded(remoteMediaStream);
             };