Sunspot logging is excessively verbose

[mvl22]

Sunspot is putting huge amounts of DEBUG data into /var/log/syslog, at a rate of several GB per day (though it is being rotated).

Config file is at:
https://github.com/cyclestreets/cyclescape/blob/master/config/sunspot.yml

[nikolai-b]

Something is wrong then as the log level should be

cyclescape/config/sunspot.yml

Line 5 in 460f8ec

log_level: WARNING