Silence ActiveJob logging from DfE::Analytics

This is extremely noisy and causes us to exceed our logit.io limit

lib/dfe/analytics/railtie.rb

@@ -13,6 +13,12 @@ class Railtie < Rails::Railtie
         app.config.middleware.use DfE::Analytics::Middleware::RequestIdentity
       end
 
+      initializer 'dfe.analytics.logger' do
+        ActiveSupport.on_load(:active_job) do
+          DfE::Analytics::AnalyticsJob.logger = ActiveSupport::TaggedLogging.new(Logger.new(IO::NULL))
+        end
+      end
+
       config.after_initialize do
         # internal gem tests will sometimes suppress this so they can test the
         # init process