Clean comment bundle

cf https://github.com/akeneo/pim-community-dev/pull/1667

| Q                    | A
| -------------------- | ---
| Bug fix?             | N
| New feature?         | N
| BC breaks?           | N
| CI currently passes? | Y
| Tests pass?          | Y
| Scenarios pass?      | ?
| Checkstyle issues?*  | N
| PMD issues?**        | N
| Changelog updated?   | N
| Fixed tickets        | PIM-3361
| DB schema updated?   |
| Migration script?    |
| Doc PR               |

Don't think so, these abstract controllers dont bring lot of value, they push to inject lot of useless services in concret controllers, only benefits is to share few shortcuts. Would prefer inject only useful services and split the product controller in smaller ones (this one is really too big)