PIM-3298 : in product edit, don't display a value with a locale specific property on its attribute
PIM-3298 : fix mass edit common attributes
PIM-3298 : add scenario for edit and mass edit a locale specific value
PIM-3298 : re-work the method which filters specific locale attributes
Merge pull request #1738 from akeneo/PIM-3298

PIM-3298 : in product edit, don't display a value with a locale specific attribute
PIM-3309: Validation on product values unicity

*Behats have exactly the same values as descripbed in the github issue #1657
*Behats to check the uniqueness of product's sku
*Added specs
*Fix uniqueness check on file only
*Fix uniqueness check from file to DB
Merge pull request #1727 from akeneo/PIM-3309

PIM-3309: Fix check on product unicity
PIM-3207: Apply the current channel in the edit product page
PIM:3207: Allow passing initial scope to scopable fields