Set correct AZ for the rally mos scenarios

Related-PROD: PROD-37187
Change-Id: Idbc2e0111f87b05bb36b97b9e1d31601e3586cc6
diff --git a/k8s/rally-files/openstack-mos-scn-i1.json b/k8s/rally-files/openstack-mos-scn-i1.json
index ef64ec9..2497ec9 100644
--- a/k8s/rally-files/openstack-mos-scn-i1.json
+++ b/k8s/rally-files/openstack-mos-scn-i1.json
@@ -1,6 +1,6 @@
 {% set flavor_name = flavor_name or "cvp.tiny" %}
 {% set image_name = image_name or "cvp.cirros.61" %}
-{% set availability_zone = "nova" %}
+{% set availability_zone = "default-az-name" %}
 {% set concurrency = 1 %}
 {% set volume_size = 1 %}
 {% set times = 1 %}