Restart containers on network configuration change
Restart containers on network configuration change

Changes to the network configuration need to cause a restart of the
interface for the changes to take place.

We can check the md5sum of the network interface config before and after
the change, and ifup/down when appropriate.

Change-Id: Ib6b2c167c1718710342fdf61c40fa3fe875f2293
Closes-Bug: #1551256

os-cloud/openstack-ansible-lxc_container_create,openstack/openstack-ansible-lxc_container_create,os-cloud/openstack-ansible-lxc_container_create,Logan2211/openstack-ansible-lxc_container_create,Logan2211/openstack-ansible-lxc_container_create,openstack/openstack-ansible-lxc_container_create