- add single use token to request for the text track

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

...src/main/java/org/bigbluebutton/api/RecordingService.java

...bigbluebutton/api/util/RecordingMetadataReaderHelper.java

.../main/java/org/bigbluebutton/api2/RecordingServiceGW.java

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

.../scala/org/bigbluebutton/api2/util/RecMetaXmlHelper.scala

bigbluebutton-web/bbb-web.nginx

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

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

...-app/controllers/org/bigbluebutton/web/UrlMappings.groovy

.../bigbluebutton/web/controllers/RecordingController.groovy