octavia: Fix log directory permission

After WSGI implementation the permissions were not fixed.

Depends-On: https://review.opendev.org/c/openstack/kolla/+/783845

Change-Id: I908efe29dcd16c10b0bc88582d8dfb23ba573a35

ansible/roles/octavia/templates/octavia-api.json.j2

@@ -37,7 +37,7 @@
     "permissions": [
         {
             "path": "/var/log/kolla/octavia",
-            "owner": "octavia:octavia",
+            "owner": "octavia:kolla",
             "recurse": true
         },
         {