Merge "Install keystonemiddleware for source build swift proxy server"

docker/openstack-base/Dockerfile.j2

@@ -115,6 +115,7 @@ RUN ln -s openstack-base-source/* /requirements \
     && /var/lib/kolla/venv/bin/pip --no-cache-dir install --upgrade -c requirements/upper-constraints.txt \
         jinja2 \
         kazoo \
+        keystonemiddleware \
         python-barbicanclient \
         python-ceilometerclient \
         python-congressclient \