fix calendar broken

lib/tasks/migrate.rake

@@ -338,4 +338,16 @@ namespace :migrate do
       @module_app.save
   end
 
+  task  :reinstall_calendar => :environment do
+      old_calendar = ModuleApp.where(key: "calendar")
+      old_calendar.destroy_all unless old_calendar.empty?
+      ModuleApp.new.from_json(File.open("#{Rails.root}/vendor/built_in_modules/calendar/calendar.json").read).save
+  end
+
+  task  :reinstall_gallery => :environment do
+      old_gallery = ModuleApp.where(key: "gallery")
+      old_gallery.destroy_all unless old_gallery.empty?
+      ModuleApp.new.from_json(File.open("#{Rails.root}/vendor/built_in_modules/gallery/gallery.json").read).save
+  end
+
 end