[Piuparts-reports] Cron <piupartsm at pejacevic> rotate_master_logs

[Cron Daemon]

'experimental/master.log' -> 'experimental/master.20171223.log'
'sid2experimental/master.log' -> 'sid2experimental/master.20171223.log'
testing2sid/master.20171222.log: 82.2 KiB / 1126.4 KiB = 0.073
'jessie/master.log' -> 'jessie/master.20171223.log'