test: add missing advisory details for integration tests database

[DmitriyLewen]

Description

vulnerability.yaml file contains extra commas. This is why advisory details for CVE-2020-14155 (and new details added after this CVE) doesn't exist in test db.

Checklist

• [x] I've read the guidelines for contributing to this repository.
• [x] I've followed the conventions in the PR title.
• [x] I've added tests that prove my fix is effective or that my feature works.
• [ ] I've updated the documentation with the relevant information (if needed).
• [ ] I've added usage information (if the PR introduces new options)
• [ ] I've included a "before" and "after" example to the description (if the PR is a user interface change).