PIM-3095: Dispatch post remove event on product
PIM-3095: Add event subscriber
PIM-3095: Remove associated products on remove
PIM-3095: Update phpdoc
PIM-3095: Dispatch pre/post events on product mass deletion
PIM-3095: Remove associated products on mass deletion
PIM-3095: Make specs work
PIM-3095: Update CHANGELOG.md
Merge pull request #1411 from akeneo/PIM-3095

PIM-3095: Cascade delete on associations on MongoDB impl