the /opt/kaltura/app/configurations/cron/dwh has:
59 0,4,8,12,16,20 * * * kaltura /opt/kaltura/dwh/etlsource/execute/etl_daily.sh -p /opt/kaltura/dwh

However, logrotate currently has %Y%m%d. This means daily will not pick
it up every 4 hours, because it skips files it already processed
previously. Added the hour to file name.