dnsmasq is already a dnsserver :/
Main problem with old way to use dnsmasq is that, on ubuntu, when you install package "dnsmasq", resolv.conf is set to 127.0.0.1... and dnsmasq try to interrogate 127.0.0.1... and fail.
That was breaking all my test.

With new LWRP, we only install dnsmasq-base, so no more big problem like this :)