move the global audio messages to the 2.0 format

...ton/core/pubsub/senders/ReceivedJsonMsgHandlerActor.scala

...n/scala/org/bigbluebutton/core/running/MeetingActor.scala

...ge/handlers/users/UserConnectedToGlobalAudioMsgHdlr.scala

...ndlers/users/UserDisconnectedFromGlobalAudioMsgHdlr.scala

.../scala/org/bigbluebutton/common2/msgs/VoiceConfMsgs.scala

...java/org/bigbluebutton/voiceconf/messaging/Constants.java

...org/bigbluebutton/voiceconf/messaging/MessageBuilder.java

...rg/bigbluebutton/voiceconf/messaging/MessageReceiver.java

...bigbluebutton/voiceconf/messaging/MessagingConstants.java

...bluebutton/voiceconf/messaging/RedisMessagingService.java

...ceconf/messaging/messages/UserConnectedToGlobalAudio.java

...f/messaging/messages/UserDisconnectedFromGlobalAudio.java

.../main/java/org/bigbluebutton/voiceconf/sip/CallAgent.java