[Backport] magento/magento2#12250: View.xml is inheriting image sizes from paren…

[quisse]

Original Pull Request

#14537

View.xml is inheriting image sizes from parent (so an optional field is replaced by the value of parent)

• Made media attributes nullable and parse them correct

Description

Fixed Issues (if relevant)

1. View.xml is inheriting image sizes from parent (so an optional field is replaced by the value of parent) #12250: View.xml is inheriting image sizes from parent (so an optional field is replaced by the value of parent)

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 @quisse. Thank you for your contribution.
We will aim to release these changes as part of 2.1.16.
Please check the release notes for final confirmation.