
Using the emperor mode of uWSGI is redundant now that we depend on systemd. This change switches uWSGI Keystone to systemd template services based on the recipe from the uWSGI documentation [1]. A new role is created to encapsulate the uWSGI login in anticipation of switching Ironic API to uWSGI as well. Reduce repetition in Keystone. [1] https://uwsgi-docs.readthedocs.io/en/latest/Systemd.html Change-Id: I50bc3f7a4faf14c36b92e7656b7149e9c833c85e