Fix new mirror system errors

Fix the reported stat name for the mirror playbook.

Run the mirror job in gate.

Set follow=false so that we're telling Ansible to set the perms
on the link rather than the target (which is the default).

Change-Id: Id594cf3f7ab1dacae423cd2b7e158a701d086af6

.zuul.yaml

@@ -668,6 +668,7 @@
         - system-config-run-dns
         - system-config-run-eavesdrop
         - system-config-run-nodepool
+        - system-config-run-mirror
         - system-config-run-docker-registry
         - system-config-run-gitea:
             dependencies:

playbooks/roles/mirror/tasks/main.yaml

@@ -75,6 +75,7 @@
     state: link
     owner: root
     group: root
+    follow: false
   with_items:
     - centos
     - ceph-deb-hammer

run_all.sh

@@ -106,7 +106,7 @@ send_timer nodepool
 
 start_timer
 timeout -k 2m 30m ansible-playbook -f 50 ${ANSIBLE_PLAYBOOKS}/service-mirror.yaml
-send_timer nodepool
+send_timer mirror
 
 start_timer
 timeout -k 2m 30m ansible-playbook -f 50 ${ANSIBLE_PLAYBOOKS}/service-registry.yaml