Sends achievement updates over RabbitMQ instead of trying to contact the API directly. This means changes to the API will no longer break the achievement update code in the future. This requires the API to also listen for updates over RabbitMQ before achievements will work again.

What's Changed

• More info logging by @Askaholic in https://github.com/FAForever/server/pull/951
• Issue/#946 Update achievements over RabbitMQ by @Askaholic in https://github.com/FAForever/server/pull/949
• Configure server contexts through yaml config by @Askaholic in https://github.com/FAForever/server/pull/945

Full Changelog: https://github.com/FAForever/server/compare/v1.12.7...v1.12.8