PIM-2182: Fix query to link on product attribute
PIM-2182: Add scenario for edit comment attributes
PIM-2182: Fix attributes merge
PIM-2182: Add scenario for mass edit action
PIM-2183: Add scenario for common attributes
PIM-2182: Update CHANGELOG.md
Merge pull request #840 from akeneo/PIM-2182

PIM-2182: Fix some issues to get common attributes