migration: compare actual fs types instead of poniters
migration: compare actual fs types instead of poniters

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

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