Add constraint for unique combination of values for variant group axis
Merge branch 'master' into PIM-1248
Merge branch 'master' into PIM-1248
Update VariantGroupMatrixValidator to validate VariantGroup and move binding products to a variant group form into a dedicated subscriber
Merge branch 'master' into PIM-1248
Fix phpcs
Don't skip variant group in product import
Merge branch 'master' into PIM-1248
Update unit test
Merge branch 'master' into PIM-1248
Fix use statement order
Prettify code
Prevent errors in case of inconsistent product values
Rename variant group axis constraint
Fix unique variant axis validation in product edit form
Merge pull request #358 from akeneo/PIM-1248

Validate products according to variant group axes