Bump sha on openstack-ansible-lxc_hosts

Bump sha on openstack-ansible-lxc_hosts

The commit 6b529de0315fe6cd12f6e78c00a5f2f2d3a01e28 in
openstack-ansible-lxc_hosts reverts an earlier change that introduced
systemd-networkd to lxc containers that run OpenStack services. This
prevents the containers from being stopped (ie, lxc-stop fails until it
times out), since systemd-networkd restarts. lxc-stop sends the SIGRT+3
message to the container which the container interprets as "halt".
systemd-networkd conflicts with shutdown, so when the system tries to
enter halt, systemd-networkd gets started again. As a result, the
container does not shut down cleanly.

This patch uses a version of openstack-ansible-lxc_hosts that does not
use systemd-networkd in the containers.

Change-Id: Ie85d2117ce2e6e8afa87810d690eab78e3b3be3d
Signed-off-by: Tapio Tallgren <tapio.tallgren@nokia.com>