This patch aims to ensure that the nova-compute systemd service is
started only after the libvirtd systemd service.
This is a re-implementation of https://review.openstack.org/593001
which is required due to the changes in how the services is setup.
Closes-Bug: 1780011
Co-Authored-By: kaiokassiano <kaiokmo@lsd.ufcg.edu.br>
Change-Id: Ie9b6d83d4a9573be96e050376f756e97895b6e67
(cherry picked from commit 689da21115)