PIM-2767 : add the originalFilename in the media normalizer (MongoDB)
PIM-2767 : transform the Media value to be able to display image in the
product grid (MongoDB)
PIM-2767 : update the changelog
PIM-2767 : fix specs
Merge branch 'master' into fix/grid_image_mongo
Merge pull request #1161 from akeneo/fix/grid_image_mongo

Fix/grid image mongo