Dev: add log level grouping in reference code logging
Dev: add log level grouping in reference code logging

Other log messages usually have some grouping associated with the log
level. So, I'm going to add some there as well.

Change-Id: Id633c043d2159dbe039c075f73dc9087b645d4d5

wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps