I am on ubuntu 15.04 and using ansible 1.9 I keep getting this following error.
Has anybody come across the issue issue,
I am using the “download” template to create lxc containers
I’m seeing the same problem on Debian jessie with LXC version 1.0.7-10 (installed from stretch). Ansible version is 1.9.3.
It fails for both the lxc-ubuntu and lxc-debian templates.
At least I know it’s not just me. 
Might be worth taking a look to see if there are any issues pertinent
filed against the LXC module, and if not, file one:
https://github.com/ansible/ansible-modules-extras/search?q=lxc&state=open&type=Issues&utf8=✓
--g