Added possibility to override validation
Fixed unit test
removed useless file
Corrected validation not applied
PMD : fix EditCommonAttributes initialize npath
Merge pull request #628 from akeneo/feature/override_validation

Feature/override validation
Fixes bad mapping
Added test for YamlReader and refactored code
Removed useless code
Fixed CS
Merge branch 'master' into oro/grid

Conflicts:
	src/Pim/Bundle/CatalogBundle/Entity/Repository/ProductRepository.php