v15.2.0: System Logging Updates

[Evan Tahler]

https://github.com/evantahler/actionhero/releases/tag/v15.2.0

This release updates the logger (api.log) in 2 meaningful ways:

• Fixes the localization of many system messages which were not using interpolation. This causes many system-specific strings to be append to your locale files when they should not have been.
  • by @evantahler via #975
• Creates a new config option api.config.logger.localizeLogMessages which allows developers to opt-into localizing all system log messages (api.log).
  • If you are migrating for an older version of ActionHero, your log messages will not be localized by default
  • The default changes in this pull request from the previous "enabled implicitly" to "disabled explicitly"
  • by @evantahler via #976