Merge branch 'bbb-2x-mconf' into work-on-meeting-lifcycle

...n/java/org/bigbluebutton/core/api/IBigBlueButtonInGW.java

...ton/core/pubsub/receivers/ConversionUpdatesProcessor.java

...ebutton/core/pubsub/receivers/PollingMessageReceiver.java

...on/core/pubsub/receivers/PresentationMessageListener.java

...button/core/pubsub/receivers/PreuploadedPresentation.java

...luebutton/core/pubsub/receivers/RedisMessageReceiver.java

...luebutton/core/pubsub/receivers/UsersMessageReceiver.java

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

...main/scala/org/bigbluebutton/core/BigBlueButtonInGW.scala

...ain/scala/org/bigbluebutton/core/MessageSenderActor.scala

...rc/main/scala/org/bigbluebutton/core/api/InMessages.scala

...c/main/scala/org/bigbluebutton/core/api/OutMessages.scala

...pps/src/main/scala/org/bigbluebutton/core/apps/Poll.scala

...rc/main/scala/org/bigbluebutton/core/apps/PollModel.scala

...n/scala/org/bigbluebutton/core/apps/PresentationApp.scala

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

.../bigbluebutton/core/domain/MeetingInactivityTracker.scala

...re/pubsub/senders/PesentationMessageToJsonConverter.scala

...ton/core/pubsub/senders/UsersMessageToJsonConverter.scala

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