don't try to chmod zfs.img when testing db upgrades
don't try to chmod zfs.img when testing db upgrades

Signed-off-by: Tycho Andersen <10c18fcb898ee6b17d6575d444b125d10b3f4d6a@canonical.com>

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