Add the needed oslo.config + oslo.incubator yaml settings.

Keystone, glance and others now dependent on oslo.config as
a pip requirement so we need to make sure we download and
setup that component as well so that it can be located when
installing components that depend on it.

Change-Id: Iab2ee40e18e356daca5590a12c426c536e571508
Merge "Add the needed oslo.config + oslo.incubator yaml settings."