🤖 Add rake task to re save importers

This rake task will allow users to re save all their importers.  It
accounts for tenants if it is a Hyku application.

```sh
bundle exec rake bulkrax:resave_importers
```

lib/tasks/bulkrax_tasks.rake

@@ -141,4 +141,25 @@ namespace :bulkrax do
  rescue => e
  puts "(#{e.message})"
  end
+
+ desc "Update importers"
+ task update_importers: :environment do
+ if defined?(::Hyku)
+ Account.find_each do |account|
+ next if account.name == "search"
+ switch!(account)
+ puts "=============== updating #{account.name} ============"
+
+ update_importers
+
+ puts "=============== finished updating #{account.name} ============"
+ end
+ else
+ update_importers
+ end
+ end
+
+ def update_importers
+ Bulkrax::Importer.all(&:save)
+ end
 end