Closing issues sends 2 notification emails

Created by: rtripault

Currently on 7683efc6

Summary when an issue is closed, all subscribers receive 2 emails :

• 1 saying "note for issue #id" with content "Status changed to closed"
• 1 saying "Closed issue #id" with content "Issue was closed by user"

Expected behavior only send 1 notification saying "Closed issue #id"