updating the perms on cron tasks, adding systemd units, and adding the hook logics

roles/common/files/ansible-run

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+cd /var/thunix/ansible
+/usr/bin/git pull
+/usr/local/bin/ansible-playbook -i /var/thunix/ansible/hosts /var/thunix/ansible/site.yml -u root
+rm /dev/shm/run-ansible
+touch /dev/shm/ansible-hook-last-run