Avoid touching all products associated with existing option type imported

[kennyadsl]

Currently, when importing a product that has a specific option type, all existing products associated with that option type are touched.

This is happening because we are doing these operations at each product import:

solidus_importer/lib/solidus_importer/processors/option_types.rb

Lines 18 to 23 in c89d279

	option_type = Spree::OptionType.find_or_initialize_by(
	name: name.parameterize
	)
	option_type.presentation ||= name
	option_type.position = i + 1
	option_type.save!

I think we should try to change the option type only if needed. It is not even clear why we need to update its position, since that position is a global value against other option types and not something specific for the product imported.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It might be closed if no further activity occurs. Thank you for your contributions.