Merge branch 'v2.0.x-release' of https://github.com/bigbluebutton/bigbluebutton into fix-5637

...tton/core/apps/users/SyncGetUsersMeetingRespMsgHdlr.scala

.../apps/users/UserJoinMeetingAfterReconnectReqMsgHdlr.scala

...luebutton/core/apps/users/UserJoinMeetingReqMsgHdlr.scala

...ebutton/core/apps/users/ValidateAuthTokenReqMsgHdlr.scala

...rc/main/scala/org/bigbluebutton/core/models/Users2x.scala

...scala/org/bigbluebutton/core/running/HandlerHelpers.scala

...ore2/message/senders/UserJoinedMeetingEvtMsgBuilder.scala

...scala/org/bigbluebutton/core2/testdata/FakeTestData.scala

...ava/org/bigbluebutton/transcode/core/VideoTranscoder.java

...rg/bigbluebutton/transcode/core/ffmpeg/FFmpegCommand.java

...bigbluebutton/clientcheck/service/RTMPTunnelingService.as

.../main/scala/org/bigbluebutton/common2/msgs/UsersMgs.scala

...b/src/main/java/org/bigbluebutton/api/MeetingService.java

...src/main/java/org/bigbluebutton/api/RecordingService.java

...-web/src/main/java/org/bigbluebutton/api/domain/User.java

.../org/bigbluebutton/api/messaging/messages/UserJoined.java

...gbluebutton/web/services/callback/CallbackUrlService.java

...g/bigbluebutton/web/services/callback/ICallbackEvent.java

...igbluebutton/web/services/callback/MeetingEndedEvent.java

...g/bigbluebutton/api2/meeting/OldMeetingMsgHdlrActor.scala