Remove non-voting check from gate queue
Remove non-voting check from gate queue

In https://review.openstack.org/516625 the
openstack-ansible-lxc-dir check was switched
to non-voting, but not removed from the gate
queue.

Change-Id: I6d15d72fe4a6acb8fcc59d4f3442f09057ea9709

openstack/openstack-ansible-lxc_hosts,openstack/openstack-ansible-lxc_hosts