Use custom cpu_models on Redhat family only

Change-Id: Ibe02bf3430bad3606e291273c8a1feb148b83711

Author: bbezak

etc/kayobe/kolla/config/nova/nova-compute.conf

@@ -1,11 +1,11 @@
 {% raw %}
+{% if ansible_facts.os_family == 'RedHat' and nova_compute_virt_type == 'kvm' %}
 [libvirt]
-# RHEL 9 and Ubuntu Jammy are being compiled for the x86_64-v2
+# RHEL 9 are being compiled for the x86_64-v2
 # architecture which is newer than the qemu default of qemu64.
 # Nehalem is apparently the oldest model that works for x86_64-v2
 # and is expected to work on Intel and AMD cpus with kvm or qemu.
-{% if nova_compute_virt_type == 'kvm' %}
-cpu_mode=custom
-cpu_model=Nehalem
+cpu_mode = custom
+cpu_models = Nehalem
 {% endif %}
 {% endraw %}