Common code for writing OpenStack upgrade checks

This project contains the common code necessary for writing upgrade checks in
OpenStack projects. It includes a module (oslo_upgradecheck.upgradecheck) for
the common code as well as an example (oslo_upgradecheck.__main__) of
integrating that code into a project.

WWW: https://docs.openstack.org/oslo.upgradecheck/latest/
WWW: https://github.com/openstack/oslo.upgradecheck