Revert "Add the systemd-networkd to centos 7 installations"
Revert "Add the systemd-networkd to centos 7 installations"

When systemd-networkd and old sysv init scripts are
managing networking, the LXC container stop times out
and causes deployments to fail.

This reverts commit 6c953712108415f9ba4bbae4a2ebd8dcea568b32.
This reverts commit 84ac3442e542aeedf1396c88e0387b4ea1548eb1.

Change-Id: I85d05cead304249c9e6a6fa84a3d5b2a0c36110f
Signed-off-by: Kevin Carter <ffb54fded2f22052678e45d78b58d223654eb6fa@rackspace.com>

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