PIM-2256 : remove FilterAttributeEvent
PIM-2256 : add catalog events (to replace flexible ones)
PIM-2256 : remove deprecated flexible events
PIM-2256 : remove the use of deprecated events
PIM-2256 : use the new catalog events
PIM-2256 : update the initialize values to use the new catalog events
PIM-2256 : upgrade doc
PIM-2256 : fix events
PIM-2256 : cosmetic
Merge pull request #903 from akeneo/mongo/events

Add catalog events (MongoDB support)