fix api context load failure for cyborg-api runs by uwsgi
fix api context load failure for cyborg-api runs by uwsgi

when deployable POST request[0] is made with admin user, it always returns
a 403 forbidden code. This patch fixes the bug.
The root cause is that "return app.app_factory(CONF)" in init_application()
will only load app:api_v1(see in [1]) and miss others filters:authtoken etc.

[0]: curl -g -i -X POST http://192.168.23.76/accelerator/v1/deployables
[1]: /etc/cyborg/api-paste.ini

Change-Id: I1498705271fe6de6fc42db9b73221d9794c36b2b

openstack/nomad