MC-100: Process and normalize attribute to ApiImport format

| Q                    | A
| -------------------- | ---
| Bug fix?             | n
| New feature?         | n
| Specs pass?*         | y
| Checkstyle issues?** | n
| PMD issues?***       | n
| Fixed tickets        | MC-100
| Doc PR               | n
What is the magento type you've to create when you have a pim_catalog_file attribute? This helper is here to map attribute types not to manage if we export files or not.