Capturing order on multi-site & multi-currency

[HirokazuNishi]

Preconditions (*)

1. Install Magento2.3.x with sample data.
2. Install CommunityEngineering_CurrencyPrecision
3. Set global base currency as JPY
4. Add new website, store group, and store view
5. Set USD as new website base currency

Steps to reproduce (*)

1. Create order from new website that defined on precondition step 4 with PayPal Express (or any other online payment method is OK)
2. Create invoice from admin panel
3. Check capture transaction result.

Expected result (*)

1. Invoice should be created as same amount as order.
2. Capture amount should be same as order base grand total

Actual result (*)

1. Capture amount is rounded and different amount is sent to payment gateway and Magento db.

CurrencyPrecision\Plugin\Directory\Model\CurrencyRounding::aroundRound should use right currency code for rounding.