Merge branch 'antobinary-implement-bbb-web-msgs' into bbb-2x-mconf

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

...ebutton/core/apps/breakout/BreakoutRoomEndedMsgHdlr.scala

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

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

...tton/core2/message/handlers/EndMeetingSysCmdMsgHdlr.scala

...e2/message/handlers/meeting/CreateMeetingReqMsgHdlr.scala

...essage/handlers/meeting/DestroyMeetingSysCmdMsgHdlr.scala

...e2/message/handlers/meeting/EndMeetingSysCmdMsgHdlr.scala

.../org/bigbluebutton/core2/message/senders/MsgBuilder.scala

...scala/org/bigbluebutton/client/MsgToClientJsonActor.scala

...ain/scala/org/bigbluebutton/common2/msgs/SystemMsgs.scala

...g/bigbluebutton/modules/users/services/MessageReceiver.as