Add cronjobs for pulling taskotron task repos

roles/taskotron/grokmirror/tasks/main.yml

@@ -45,3 +45,11 @@
 
 - name: generate grokmirror config
   template: src=repos.conf.j2 dest=/etc/grokmirror/repos.conf owner={{ grokmirror_user }} group={{ grokmirror_user }} mode=0644
+
+- name: install cron jobs to update repos
+  cron:
+    name="pull repo for {{ item.name }}"
+    user={{ grokmirror_user }}
+    special_time=hourly
+    job="cd {{ grokmirror_basedir }}/{{ item.name }} && git fetch origin {{ grokmirror_default_branch }}:{{ grokmirror_default_branch }}"
+  with_item: grokmirror_repos