Merge pull request #4106 from ritzalam/restructure-handlers

...luebutton/core/apps/users/AssignPresenterReqMsgHdlr.scala

...bluebutton/core/apps/users/ChangeUserRoleCmdMsgHdlr.scala

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

...button/core/apps/users/GetRecordingStatusReqMsgHdlr.scala

...utton/core/apps/users/LogoutAndEndMeetingCmdMsgHdlr.scala

...n/core/apps/users/MeetingActivityResponseCmdMsgHdlr.scala

...igbluebutton/core/apps/users/RegisterUserReqMsgHdlr.scala

...button/core/apps/users/SetRecordingStatusCmdMsgHdlr.scala

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

...in/scala/org/bigbluebutton/core/apps/users/UsersApp.scala

.../scala/org/bigbluebutton/core/apps/users/UsersApp2x.scala

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