PIM-2440: Make filters work for family
PIM-2440: Make filter works for group
PIM-2440: Make it work for MongoDB implementation
PIM-2440: Rename queryBuilder variables by qb
PIM-2440: Add spec for EntityFilter on empty value
PIM-2440: Remove useless object typehint
PIM-2440: Add php spec for ORM EntityFilter
Merge branch 'PIM-2440' of github.com:akeneo/pim-community-dev into PIM-2440
Merge pull request #1034 from akeneo/PIM-2440

PIM-2440: Filter by empty family