Upgrade for spree 2.2
Updated assets path
S3 support removed in Spree 2.2. See https://github.com/halo/spree_digital/issues/57. Changed declaration to decorator
S3 support removed in Spree 2.2. See https://github.com/halo/spree_digital/issues/57
https://github.com/spree/spree/blame/v2.2.1/core/app/models/spree/order_populator.rb#L13-L16