nova: Add debug logging to libvirtd.conf

Change-Id: Ibbb962b035b695eec022566cf9f7d6c200480c45

ansible/roles/nova-cell/templates/libvirtd.conf.j2

@@ -12,6 +12,11 @@ auth_tcp = "none"
 tcp_port = "{{ nova_libvirt_port }}"
 ca_file = ""
 {% endif %}
+{% if nova_logging_debug | bool %}
+log_level = 1
+log_outputs = "1:file:/var/log/kolla/libvirt/libvirtd.log"
+{% else %}
 log_level = 3
 log_outputs = "3:file:/var/log/kolla/libvirt/libvirtd.log"
+{% endif %}
 listen_addr = "{{ migration_interface_address }}"