Cron module wants strings

We're getting ansible warnings about converting these to strings
for us.

Change-Id: Iba70b5e71ded01ca2e11276fb2f007c9d7aa1866

playbooks/roles/gitea/tasks/main.yaml

@@ -156,7 +156,7 @@
     job: "docker exec -t gitea-docker_gitea-web_1 find /data/git/repositories/ -maxdepth 2 -name *.git -type d -execdir git --git-dir={} gc --quiet \\;"
     minute: '{{ 59 | random(seed=inventory_hostname) }}'
     hour: '{{ 23 | random(seed=inventory_hostname) }}'
-    weekday: 0
+    weekday: '0'
 - name: Create db backup dest
   file:
     state: directory

playbooks/roles/zuul-executor/tasks/main.yaml

@@ -89,8 +89,8 @@
     name: pack-git-refs
     state: present
     job: 'find /var/lib/zuul/git/ -maxdepth 3 -type d -name ".git" -exec git --git-dir="{}" pack-refs --all \;'
-    minute: 7
-    hour: 4
+    minute: '7'
+    hour: '4'
 
 - name: Install logging config
   copy:

playbooks/roles/zuul-merger/tasks/main.yaml

@@ -12,8 +12,8 @@
     name: pack-git-refs
     state: present
     job: 'find /var/lib/zuul/git/ -maxdepth 3 -type d -name ".git" -exec git --git-dir="{}" pack-refs --all \;'
-    minute: 7
-    hour: 4
+    minute: '7'
+    hour: '4'
 
 - name: Install logging config
   copy:

playbooks/roles/zuul-status-backup/tasks/main.yaml

@@ -22,6 +22,6 @@
     name: 'zuul-scheduler-status-prune-{{ tenant }}'
     state: present
     user: root
-    minute: 0
+    minute: '0'
     job: |
       flock -n /var/run/{{ tenant }}_status_prune.lock ls -dt -1 /var/lib/zuul/backup/{{ tenant }}_* |sed -e '1,120d' |xargs rm -f