1. The OpenStack infrastructure provides us with a list of mirrors
which are already templated so this will simply the process of
using those mirrors instead of the previous implementation which
tries to derive the right URL's.
2. Instead of rewriting the host's sources file for Ubuntu, we leave
it alone.
3. We place the overrides into a new override file to simplify the
implementation and no longer require a bunch of conditionals in
the user_variables template. Some more clean-up can be done, but
it will follow on later.
4. The ceph-ansible project has created a new library which is held
in the root folder of the repo. We need to ensure that the library
path is included, but that results in other breakages. To help
get patches moving through the system again we pin the SHA to just
prior the upstream changes.
5. The MariaDB mirror setting has been removed due to the default
MariaDB setup being done via a specific pin. The apt repo setup
for MariaDB is no longer being used.
Co-Authored-By: Jesse Pretorius <jesse.pretorius@rackspace.co.uk>
Change-Id: Ib908e5503ecc93255d554d027ec62539c6316099
90c130575d