Test: CTS: overhaul lxc_autogen.sh to synchronize on all nodes

Before, the -s option (for synchronization of changes with all nodes)
only applied to the container filesystem. However, migrating a container
will fail because the network would not be configured appropriately.
Now, -s synchronizes /etc/pacemaker/authkey, /etc/hosts entries,
and the libvirt network as well as the filesystem.