Copy dial number from the parent room to all breakout rooms.

...on/core/apps/breakout/CreateBreakoutRoomsCmdMsgHdlr.scala

.../test/scala/org/bigbluebutton/core/AppsTestFixtures.scala

...n/scala/org/bigbluebutton/common2/msgs/BreakoutMsgs.scala

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

...bluebutton/api/messaging/messages/CreateBreakoutRoom.java

...org/bigbluebutton/api2/meeting/MeetingsManagerActor.scala

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