Keystone supports setting custom properties for projects. This changes add
properties to os_project to enable setting of custom properties.
Depends-On: https://review.opendev.org/715255
Change-Id: I23e2834d6b9d40ce86db4b32a0ed8bf76b3d9879
Collections are new. openstacksdk as of now doesn't support python2.
We shouldn't pretend to support python2 either. If you're using
ansible new enough to use collections, you can use python3.
This release of openstacksdk only supports 3.6 and onwards, so
set that as our min.
Change-Id: I34d544ce48f25bffde8e6e0cf82cdf9a85e681c3