This converts the reprepro configuration from our existing puppet to
Ansible.
This takes a more direct approach; the templating done by the puppet
version started simple but over the years grew several different
options to handle various use-cases. This means you not only had to
understand the rather obscure reprepro configuration, but then *also*
figure out how to translate that from our puppet template layers.
Here the configuration files are kept directly (they were copied from
the existing mirror-update.openstack.org) and deployed with some light
wrapper tasks in reprepro/tasks/utils which avoids most duplication.
Note the initial cron jobs are left disabled so we can run some manual
testing before letting it go automatically.
Change-Id: I96a9ff1efbf51c4164621028b7a3a1e2e1077d5c
3eceba5749