This reverts commit 440c87a808c0cec2e2f10b6758596c2754b7dfe0.
The commit is reverted because it uses a lookup to resolve the version
of lxc. This is executed on the deploy host and not the targets. The
Depends-On is a patch to the lxc_container_create role which addresses
the differences between lxc2/3 configuration keys dynamically and
resolves the installed lxc version on a per-target basis.
Depends-On: https://review.openstack.org/601534
Change-Id: Id3669777ad50f9e90a08212daa8d9e252b01089b
11e601fa8c