lvm: Hide fdleak messages
lvm: Hide fdleak messages

Those were leading to various functions failing due to invalid output
from LVM.

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

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