Use the elasticsearch-rails gem

[taoeffect]

Tire is no longer updated, isn't compatible with Elasticsearch 1.x, and recommends switching to elasticsearch-rails

• https://github.com/karmi/retire
• https://github.com/karmi/retire/wiki/Tire-Retire

[RISCfuture]

We have plans to switch to Chewy, since it's more similar to Tire and will require less of an overhaul.