PIM-2148 : move flexible sorter and create dedicated product field and
product value sorter
PIM-2184 : update sorter services configuration and update changelog and
upgrade doc
Merge branch 'master' into mongo/grid-sorters
PIM-2184 : use new product field sorter in grids
PIM-2184 : add addFieldSorter implementation for MongoDB
PIM-2184: fix product field sorters
PIM-2274 : update product normalizer to normalize created at and updated
at dates
PIM-2184 : update product normalizer to normalize created at / updated
at properties
PIM-2184 : cosmetic
PIM-2184 : fix created / updated properties in hydrator (MongoDB)
PIM-2184 : normalize enabled field in product
PIM-2184 : ensure properties are always in product result record
PIM-2184 : fix the field sorter
PIM-2184 : move normalized field constant
PIM-2184 : move constant to query utility
PIM-2184 : fix CS
Merge branch 'master' into mongo/grid-sorters
PIM-2184 : fix sorters in variant product grid, association and group
Merge pull request #910 from akeneo/mongo/grid-sorters

Product grid sorters (MongoDB support)