setupSharedMounts: always create shmounts
setupSharedMounts: always create shmounts

so check whether it is on a shared mount ptah after we created it

Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

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