lxd: Refresh all dnsmasq hosts during patch.
lxd: Refresh all dnsmasq hosts during patch.

Previous version of this patch attempted to rename files based on
the config properties of each instance. This was error prone and may
have led to errors. This patch wipes and recreates all of them using an
established method.

Signed-off-by: Mark Laing <e4eb1ed17d42befab1db63da5bbc17c0a2c16113@canonical.com>

stgraber/lxd,hallyn/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,hallyn/lxd,hallyn/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,lxc/lxd