Add OVN support

Install docs:
https://docs.openstack.org/networking-ovn/latest/install/index.html

Partial Prod: PROD-15003

Co-Authored-By: Elena Ezhova <eezhova@mirantis.com>
Change-Id: I0a7023f3e14aae6d5ec5efe8f117ebc9d0ed302d
diff --git a/tests/pillar/compute_ovn.sls b/tests/pillar/compute_ovn.sls
new file mode 100644
index 0000000..0f4b580
--- /dev/null
+++ b/tests/pillar/compute_ovn.sls
@@ -0,0 +1,9 @@
+neutron:
+  compute:
+    enabled: true
+    version: ocata
+    local_ip: 10.2.0.105
+    controller_vip: 10.1.0.101
+    external_access: false
+    backend:
+      engine: ovn