Updated openstack/openstack
Project: openstack/taskflow  a6cc21805224c03d7ac87e7a477d48c2af2835d8

Use a metaclass to dynamically add testcases to example runner

Instead of using a custom update() mechanism just take advantage
of a metaclass that can dynamically add our desired test functions
on in a more pythonic manner.

Change-Id: I8f4940f85dd7b5255c181795606ac76ca5605baa