Description (*)

Enhanced error outputting for the new Magento 2 db schema generation.

Fixed Issues (if relevant)

1. Fixes Enhance errors showing for the new Magento 2 DB Schema XML dialog window #877

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 integration/functional tests (if applicable)
• All automated tests passed successfully (all builds are green)