Merge "CI: add kolla-ansible zun job to tests"

Author: Zuul

.zuul.d/ubuntu.yaml

@@ -31,6 +31,8 @@
             files: ^docker/proxysql/
         - kolla-ansible-ubuntu-bifrost:
             files: ^docker/bifrost/
+        - kolla-ansible-ubuntu-zun:
+            files: ^docker/|zun/
     check-arm64:
       jobs:
         - kolla-build-ubuntu-aarch64