Switch enforce-scope job to ovn

OVN is the default driver now. There is nothing specific to ovs driver
in this job, I think.

Change-Id: Iec19280e587b82b27b64805289c573e74ef5a84a
diff --git a/zuul.d/master_jobs.yaml b/zuul.d/master_jobs.yaml
index 9688954..23e4102 100644
--- a/zuul.d/master_jobs.yaml
+++ b/zuul.d/master_jobs.yaml
@@ -457,8 +457,8 @@
       - ^zuul.d/zed_jobs.yaml
 
 - job:
-    name: neutron-tempest-plugin-openvswitch-enforce-scope-old-defaults
-    parent: neutron-tempest-plugin-openvswitch
+    name: neutron-tempest-plugin-ovn-enforce-scope-old-defaults
+    parent: neutron-tempest-plugin-ovn
     vars:
       devstack_localrc:
         NEUTRON_ENFORCE_SCOPE: false