[Forwardport] Fixing a Mistype Error

[tiagosampaio]

Replacing the method proccessAdditionalValidation by processAdditionalValidation. It's was mistype error.

Description

Fixed a mistype error in a method name.

Fixed Issues (if relevant)

None.

Manual testing scenarios

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)

Original PR

#16414

[magento-engcom-team]

Hi @tiagosampaio. Thank you for your contribution
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[orlangur]

Changes must be applied to 2.2-develop first.

[tiagosampaio]

@orlangur the same pull request was applied to branch 2.2-develop and it's already merged. Please check the pull request in #16414.

[orlangur]

@tiagosampaio true, thanks for pinging!

[magento-engcom-team]

Hi @orlangur, thank you for the review.
ENGCOM-2338 has been created to process this Pull Request

[magento-engcom-team]

Hi @tiagosampaio. 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.