Normally a standalone uwsgi server would run in "master" mode -- it
handles signals to reload the processes. I tried this originally
with keystone but found that the server didn't shut down when
unstacking. The reason it didn't shut down is because (by default)
uwsgi does a reload on SIGTERM & SIGHUP rather than shutting down by
default, see [1].
Setting "die-on-term = true" & "exit-on-reload = true" changes the
uwsgi server to shut down when unstacking.
[1] http://uwsgi-docs.readthedocs.org/en/latest/Management.html#reloading-the-server
Change-Id: I145fef185d4a31078295941779e175b7452a5760
4abcfaa86e