Merge pull request #4070 from ritzalam/antobinary-implement-bbb-web-msgs-2

...tton/core/apps/users/EjectUserFromMeetingCmdMsgHdlr.scala

...g/bigbluebutton/core/apps/users/UserLeaveReqMsgHdlr.scala

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

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

...gbluebutton/red5/client/messaging/CloseConnectionMsg.java

.../red5/client/messaging/CloseMeetingAllConnectionsMsg.java

...c/main/scala/org/bigbluebutton/client/MsgToClientGW.scala

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

...la/org/bigbluebutton/client/bus/MsgToClientEventBus.scala

...scala/org/bigbluebutton/client/meeting/MeetingActor.scala

...in/scala/org/bigbluebutton/client/meeting/UserActor.scala

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

...utton/red5/client/messaging/ConnectionInvokerService.java

...g/bigbluebutton/modules/users/maps/UsersMainEventMap.mxml