fix getFile for export
optimize export
Merge remote-tracking branch 'Arnaud/opti-export' into postPilote3

Conflicts:
	src/Innova/SelfBundle/Manager/ExportManager.php
	src/Innova/SelfBundle/Resources/translations/messages.cn.yml
	src/Innova/SelfBundle/Resources/translations/messages.en.yml
	src/Innova/SelfBundle/Resources/translations/messages.fr.yml
	src/Innova/SelfBundle/Resources/translations/messages.it.yml
Amélioration du code.
Merge pull request #658 from ericvincenterv/postPilote3

Post pilote3