#25787 Gap Essentials VIPs & Partners Free Shipping

- Create ruby script for free shipping if customer checkout has indicated voucher code for VIP and Partners
- Add condition that will hide Provincial shipping option if customer's provincial address is Metro Manila and same goes for Metro Manila if customer's provincial address are outside metro manila
- Create script that will add 100% discount on shipping fee for voucher codes on May 28 - June 6 and for May 31 - June 6
- Generate the script and add to the main file script of shopify for testing