Enable upload to pypi for python-reddwarfclient

Update the Openstack CI config for python-reddwarfclient so that we can:
1. Publish pre-release tarballs to tarballs.openstack.org
2. Publish and upload released builds to the pypi server.

Fixes bug: 1131455

Change-Id: I1526065435eed809487b7677c0a154b37d3d805b
Reviewed-on: https://review.openstack.org/22632
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins