[0] switched keystone to use uwsgi and mod_proxy_uwsgi by default
instead of mod_wsgi breaking the Devstack plugin which assumed
the latter. This commit fixes the Devstack plugin to work with
both and therefore fixes the functional v3 only gates which
are currently broken.
[0]. I46294fb24e3c23fa19fcfd7d6c9ee8a932354702
Change-Id: Iaffb3f18fd0f1444a6b6067d63474c27eb1bd13d
b8555843bf