- fix where 2 events are recorded in redis for each voice event.

.../org/bigbluebutton/core/recorders/VoiceEventRecorder.java

akka-bbb-apps/src/main/scala/org/bigbluebutton/Boot.scala

...ain/scala/org/bigbluebutton/core/BigBlueButtonActor.scala

...main/scala/org/bigbluebutton/core/BigBlueButtonInGW.scala