[WIP] PIM-3377: Check if locale specific exists in attribute dunring import

TODO:

- [x] Fix the behat
- [x] Add a check on import (see jira tiket PIM-3377)
- [ ] Add a check on export (see jira tiket PIM-3377)

| Q                    | A
| -------------------- | ---
| Bug fix?             |
| New feature?         |
| BC breaks?           |
| CI currently passes? |
| Tests pass?          |
| Scenarios pass?      |
| Checkstyle issues?*  |
| PMD issues?**        |
| Changelog updated?   |
| Fixed tickets        |
| Doc PR               |
filterLocaleSpecificValue ?