Fix error in UniqueVariantAxisValidator
Fix error in UniqueVariantAxisValidator
PIM-1544 : Add PHP documentation on Csv Processor
PIM-1544 : Create abstract entity processor and make association processor class extending from abstract entity processor
PIM-1544 : Refactor Processors
PIM-1544 : Update CHANGELOG
PIM-1544 : Fix PHPCS
PIM-1544 : Update translation messages
PIM-1544 : Update translations for import
Merge pull request #473 from akeneo/PIM-1544

PIM-1544 : Refactoring ImportExport bundle
PIM-1544 : Add missing translations
Merge pull request #474 from akeneo/PIM-1544

PIM-1544 : Add missing translations
Fixed PIM-1518
PIM-918 : reduce attribute import to required properties, fix attribute
validation, fix UT
Merge branch 'master' into PIM-918

Conflicts:
	src/Pim/Bundle/ImportExportBundle/Resources/translations/messages.en.yml