Fix closing upon download completion in fetcher
Fix closing upon download completion in fetcher

mdesco/dipy,mdesco/dipy,sinkpoint/dipy,oesteban/dipy,demianw/dipy,nilgoyyou/dipy,rfdougherty/dipy,nilgoyyou/dipy,StongeEtienne/dipy,Messaoud-Boudjada/dipy,samuelstjean/dipy,villalonreina/dipy,beni55/dipy,demianw/dipy,beni55/dipy,matthieudumont/dipy,samuelstjean/dipy,rfdougherty/dipy,JohnGriffiths/dipy,FrancoisRheaultUS/dipy,Messaoud-Boudjada/dipy,villalonreina/dipy,jyeatman/dipy,matthieudumont/dipy,samuelstjean/dipy,sinkpoint/dipy,JohnGriffiths/dipy,jyeatman/dipy,FrancoisRheaultUS/dipy,oesteban/dipy,StongeEtienne/dipy