lxd/api/internal: d.cluster.InstanceID usage
lxd/api/internal: d.cluster.InstanceID usage

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

mjeanson/lxd,hallyn/lxd,hallyn/lxd,hallyn/lxd,hallyn/lxd,atxwebs/lxd,atxwebs/lxd,hallyn/lxd,lxc/lxd,lxc/lxd,Skarlso/lxd,stgraber/lxd,stgraber/lxd,mjeanson/lxd,lxc/lxd,stgraber/lxd,Skarlso/lxd,atxwebs/lxd,lxc/lxd,stgraber/lxd,lxc/lxd,stgraber/lxd,atxwebs/lxd,lxc/lxd,mjeanson/lxd,Skarlso/lxd,hallyn/lxd,Skarlso/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd