Merge pull request #12395 from gustavotrott/end-when-no-moderator

.../scala/org/bigbluebutton/core/domain/MeetingState2x.scala

...scala/org/bigbluebutton/core/domain/MeetingTrackers.scala

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

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

...in/scala/org/bigbluebutton/common2/domain/Meeting2x.scala

...c/test/scala/org/bigbluebutton/common2/TestFixtures.scala

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

.../main/java/org/bigbluebutton/api/ParamsProcessorUtil.java

...b/src/main/java/org/bigbluebutton/api/domain/Meeting.java

...src/main/java/org/bigbluebutton/api2/IBbbWebApiGWApp.java

...rc/main/scala/org/bigbluebutton/api2/BbbWebApiGWApp.scala

...html5/imports/api/meetings/server/modifiers/addMeeting.js

bigbluebutton-web/grails-app/conf/bigbluebutton.properties

bigbluebutton-web/grails-app/conf/spring/resources.xml