Comment 6 for bug 1428434

@Haiwei : thx for the template. I check it and you are right, it's really Heat bug.
We have not check for such definition, when used only network in port's properties.

I will upload fix for it soon, as temporary solution I suggest you to use "fixed_ips" property and set "subnet", instead of network.
Also it's more clear when you create you own subnet, otherwise you will get copies of this port in all subnets assigned on network.