Add a cron to update ansible galaxy every 6h
Add a cron to update ansible galaxy every 6h

We missed more bugfix than we avoided breakage due to the
policy of not updating. If people want to not get update
, they can pin version down in requirements.yml.

OSAS/ansible-role-ansible_bastion,OSAS/ansible-role-ansible_bastion,mscherer/ansible-role-ansible_bastion,mscherer/ansible-role-ansible_bastion