Update keystoneauth1 to 2.19.0
Update keystoneauth1 to 2.19.0

Change-Id: If87b4734a28e2a444c6ce90bcaea46f5deb9ab94
Depends-on: I793ad186874ec1136de80321cd36f8d3d6054833
Depends-On: I885fe8aa4668ed64054d1d37384fd357b334049a

openstack/rpm-packaging,openstack/rpm-packaging