Summary should be a one liner

Without this change twine check dist/* would fail as this was
producing a double new line. The rest of the PKG-INFO would then
be interpreted as the message body and become the long
description. See https://github.com/pypa/twine/issues/422 for
more details.

This fixes the test-release-openstack-python3 zuul job.

TrivialFix

Change-Id: If1330c4824e949aa427475dfcc26218fb398a66e

setup.cfg

 [metadata]
 name = kayobe
-summary =
-    Deployment of OpenStack to bare metal using OpenStack kolla and bifrost
+summary = Deployment of OpenStack to bare metal using OpenStack kolla and bifrost
 description-file =
     README.rst
 author = OpenStack