ask akka-apps if allowed to start screenshare

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

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

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

...s/src/main/scala/org/bigbluebutton/core/LiveMeeting.scala

.../src/main/scala/org/bigbluebutton/core/MeetingActor.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

...ebutton/common/messages/AllowUserToShareDesktopReply.java

...tton/app/screenshare/messaging/redis/MessageReceiver.java

...creenshare/messaging/redis/RedisPubSubMessageHandler.java

...rg/bigbluebutton/app/screenshare/red5/Red5AppHandler.java

...rg/bigbluebutton/app/screenshare/red5/Red5AppService.java

...igbluebutton/app/screenshare/ScreenShareApplication.scala

...ebutton/app/screenshare/server/sessions/Screenshare.scala

bbb-screenshare/app/src/main/webapp/WEB-INF/red5-web.xml

...luebutton/modules/screenshare/services/MessageReceiver.as