get parent url if is available.

[Bashev]

Description (*)

When we have configurable products with simples which are not visible individually we must get parent product url to push proper link to all children. This is correctly defined in ProductRepository https://github.com/magento/meta-for-magento2/blob/9b12569141be385d6e264eb4c456d1d936745f4e/app/code/Meta/Catalog/Model/ProductRepository.php#L94 but on the next line we make all products visible... https://github.com/magento/meta-for-magento2/blob/9b12569141be385d6e264eb4c456d1d936745f4e/app/code/Meta/Catalog/Model/ProductRepository.php#L95 then validation in https://github.com/magento/meta-for-magento2/blob/9b12569141be385d6e264eb4c456d1d936745f4e/app/code/Meta/Catalog/Model/Product/Feed/Builder.php#L252 never will be true and "non visible" product will be returned in all cases.

Fixed Issues (if relevant)

1. Possible fixes: magento/meta-for-magento2#48

Checklist

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