Relase 4.2.10
AKM-29: Memory leak in api step
- flush removed from the core causes \Oro\Bundle\MessageQueueBundle\Client\BufferedMessageProducer::flushBuffer skip
- causes \Oro\Bundle\AkeneoBundle\ImportExport\Writer\AsyncWriter to keep messages and json data in memory
- \Akeneo\Pim\ApiClient\Pagination\Page::getPage do not free up memory because of json data in u