use of association defaultCommission if commission for association / producer is null
Merge branch 'feature-admin-association-producer' of github.com:isics/OpenMiamMiam into feature-admin-association-producer

Conflicts:
	src/Isics/Bundle/OpenMiamMiamBundle/Resources/translations/messages.fr.yml
Merge branch 'feature-admin-association-producer' of github.com:isics/OpenMiamMiam into feature-admin-association-producer
Merge branch 'feature-admin-association-producer' of github.com:isics/OpenMiamMiam into feature-admin-association-producer