If resume_guests_state_on_host_boot is set in nova.conf instances
need to be shutdown using libvirt-guests after nova_compute container
is shut down. Therefore we need a customized libvirt-guests unit file
which:
1) removes the dependency to libvirt (non container) that it don't
get started as a dependency and make the nova_libvirt container
to fail.
2) adds a dependency to docker related services that a shutdown of
nova_compute container is possible on system reboot.
3) stops nova_compute container
4) shutdown VMs
This is a missing part of Bug 1778216.
Change-Id: Ic4b7b427827114fcec0f4973a200461e811ee53a
Related-bug: 1778216