[Forwardport] Validate that the PO Number is set on the payment instance.

[mage2pratik]

Original Pull Request

#14393

Description

Validate that the po_number is set on the info instance.

Fixed Issues (if relevant)

1. Optional PO number #6585

Manual testing scenarios

1. Available on the issue description.

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @mage2pratik. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

• @magento-engcom-team give me test instance - deploy test instance based on PR changes
• @magento-engcom-team give me {$VERSION} instance - deploy vanilla Magento instance

For more details, please, review the Magento Contributor Assistant documentation

[sidolov]

Please, add changes from commit: 1d833da2d152bfbc1d1cac27fae00ea1529bc9ea to this port. Mentioned commit fixes functional tests.

[magento-engcom-team]

Hi @sidolov, thank you for the review.
ENGCOM-2954 has been created to process this Pull Request

[magento-engcom-team]

Hi @mage2pratik. Thank you for your contribution.
We will aim to release these changes as part of 2.3.0.
Please check the release notes for final confirmation.