Squelch Snowplow tracker log messages
These log messages often pollute structured log streams and do not provide useful information. We tweak the log level to FATAL to suppress all output (https://github.com/snowplow/snowplow/wiki/Ruby-Tracker#7-logging)
https://github.com/snowplow/snowplow-ruby-tracker/pull/109 would make it possible to configure this logger directly.
Edited by Stan Hu