setup-openstack-storpool/pre: Do not validate YAML

Change-Id: I21820776fed18bef033e2f61edb893787fc152c8
diff --git a/playbooks/setup-openstack-storpool/pre.yaml b/playbooks/setup-openstack-storpool/pre.yaml
index 0aa6873..a641363 100644
--- a/playbooks/setup-openstack-storpool/pre.yaml
+++ b/playbooks/setup-openstack-storpool/pre.yaml
@@ -458,7 +458,7 @@
               - "-i"
               - "inventory.yaml"
               - "--skip-tags"
-              - "perform-tests"
+              - "perform-tests,validate-yaml"
               - "--extra-vars"
               - "sp_target_release={{ sp_target_release }}"
           args: