MAGETWO-32974: DB Foreign Keys Management on the Application Level

- add validation logic for EAV models

Author: Olexii Korshenko

app/code/Magento/Eav/Model/Entity/AbstractEntity.php

@@ -1182,6 +1182,8 @@ public function save(\Magento\Framework\Object $object)
 
                 $object->setParentId((int)$object->getParentId());
 
+                $this->objectRelationProcessor->validateDataIntegrity($this->getEntityTable(), $object->getData());
+
                 $this->_beforeSave($object);
                 $this->_processSaveData($this->_collectSaveData($object));
                 $this->_afterSave($object);