Use ActiveJob instead of Resque directly

This allows us to directly pass entities to the job.

plugins/messages/app/jobs/deliver_message_job.rb

@@ -0,0 +1,15 @@
+class DeliverMessageJob < ApplicationJob
+  def perform(message)
+    message.message_recipients.each do |message_recipient|
+      recipient = message_recipient.user
+      if recipient.receive_email?
+        Mailer.deliver_now_with_user_locale recipient do
+          MessagesMailer.foodsoft_message(recipient, message)
+        end
+        message_recipient.update_attribute :email_state, :sent
+      else
+        message_recipient.update_attribute :email_state, :skipped
+      end
+    end
+  end
+end