mirror: Fix warnings from cron jobs

roles/mirror/base/tasks/main.yml

@@ -79,15 +79,15 @@
   cron:
     name: sync-mirrors
     hour: "0,6,12,18"
-    minute: 0
+    minute: "0"
     job: /usr/local/bin/sync-mirrors
     user: mirror
 
 - name: create log rotate cron job for sync-mirrors
   cron:
     name: sync-mirrors-logs
-    hour: 5
-    minute: 10
+    hour: "5"
+    minute: "10"
     job: "find /var/log/sync-mirrors/ -xdev -type f \
      -mtime +30 -name '*.log' -execdir rm {} \\+"
     user: mirror

roles/mirror/thinlinc/tasks/main.yml

@@ -26,7 +26,7 @@
 - name: create sync cron job
   cron:
     name: sync-thinlinc-repo
-    hour: 4
-    minute: 5
+    hour: "4"
+    minute: "5"
     job: /usr/local/bin/sync-thinlinc-repo
     user: mirror