Execute kvm-setup inside nova_libvirt container

On POWER8 (and some others), kvm requires some additional setup before
VMs can be successfully run. There is a script to perform this setup,
but it is provided as a systemd service -- we don't have systemd inside
containers, so let's include the invocation of the script in the
definition of the container.

Change-Id: I1e7208e4bd1c7f0c87354b6f6963c0d2df86cc02
Closes-Bug: #1878048

deployment/nova/nova-libvirt-container-puppet.yaml

@@ -567,11 +567,7 @@ outputs:
         config_image: {get_param: ContainerNovaLibvirtConfigImage}
       kolla_config:
         /var/lib/kolla/config_files/nova_libvirt.json:
-          command:
-            if:
-              - use_tls_for_live_migration
-              - /usr/sbin/libvirtd --listen
-              - /usr/sbin/libvirtd
+          command: /nova_libvirt_launcher.sh
           config_files:
             list_concat:
               -
@@ -642,6 +638,24 @@ outputs:
               dest: "/"
               merge: true
               preserve_properties: true
+      container_config_scripts:
+        nova_libvirt_launcher.sh:
+          mode: "0755"
+          content:
+            str_replace:
+              template: |
+                #!/bin/bash
+                set -xe
+                if [[ -f /usr/lib/systemd/kvm-setup ]]; then
+                  /usr/lib/systemd/kvm-setup
+                fi
+                /usr/sbin/libvirtd LIBVIRTD_ARGS
+              params:
+                LIBVIRTD_ARGS:
+                  if:
+                    - use_tls_for_live_migration
+                    - '--listen'
+                    - ''
       docker_config:
         step_3:
           nova_virtlogd:
@@ -694,6 +708,7 @@ outputs:
                   - /etc/ssh/ssh_known_hosts:/etc/ssh/ssh_known_hosts:ro
                   - /var/lib/kolla/config_files/nova_libvirt.json:/var/lib/kolla/config_files/config.json:ro
                   - /var/lib/config-data/puppet-generated/nova_libvirt:/var/lib/kolla/config_files/src:ro
+                  - /var/lib/container-config-scripts/nova_libvirt_launcher.sh:/nova_libvirt_launcher.sh:ro
                   - /etc/ceph:/var/lib/kolla/config_files/src-ceph:ro
                   - /lib/modules:/lib/modules:ro
                   - /dev:/dev