Sidekiq.configure_server do |config|
  config.redis = { url: "redis://#{REDIS_HOST}:6379/0" }
end

Sidekiq.configure_client do |config|
  config.redis = { url: "redis://#{REDIS_HOST}:6379/0" }
end

Sidekiq.configure_server do |config|
  config.redis = { url: "redis://#{ENV['REDIS_HOST']}:6379/0" }
end

Sidekiq.configure_client do |config|
  config.redis = { url: "redis://#{ENV['REDIS_HOST']}:6379/0" }
end

Fix errant ENV reference to REDIS_HOST
Fix errant ENV reference to REDIS_HOST

This is just a typo, and a cost of not having CI running. Mea Culpa on both
counts.
