Add useful comments for importer

lib/modules/wdpa/protected_area_importer/attribute_importer.rb

@@ -20,6 +20,11 @@ def self.create_protected_area(attributes)
     protected_area_id = nil
     begin
       ActiveRecord::Base.transaction(requires_new: true) do
+        # Below lines were needed on staging as the ProtectedArea model
+        # wasn't getting the new columns information after switching from the
+        # postgres db to the newly created db
+        #ProtectedArea.connection.schema_cache.clear!
+        #ProtectedArea.reset_column_information
         protected_area_id = ProtectedArea.create!(standardised_attributes).id
       end
     rescue