Fix failure to stop snapshots on migration failure
Fix failure to stop snapshots on migration failure

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

pcdummy/lxd,stgraber/lxd,erikmack/lxd,lxc/lxd,lxc/lxd,techtonik/lxd,yura-pakhuchiy/lxd,techtonik/lxd,chrisglass/lxd,atxwebs/lxd,lxc/lxd,Skarlso/lxd,atxwebs/lxd,atxwebs/lxd,lxc/lxd,lxc/lxd,jsavikko/lxd,hallyn/lxd,Skarlso/lxd,akshaykarle/lxd,mjeanson/lxd,hallyn/lxd,georghopp/lxd,chrisglass/lxd,ollie314/lxd,georghopp/lxd,erikmack/lxd,akshaykarle/lxd,ollie314/lxd,lxc/lxd,pcdummy/lxd,chrisglass/lxd,hallyn/lxd,pcdummy/lxd,akshaykarle/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,Skarlso/lxd,stgraber/lxd,jsavikko/lxd,mjeanson/lxd,hallyn/lxd,yura-pakhuchiy/lxd,stgraber/lxd,georghopp/lxd,jsavikko/lxd,atxwebs/lxd,stgraber/lxd,Skarlso/lxd,yura-pakhuchiy/lxd,erikmack/lxd,techtonik/lxd,mjeanson/lxd,ollie314/lxd