nova-volume volume creation fails, tgt config not loaded

Commit @ https://review.openstack.org/#/c/13633/ removes the explicit specification of volume config files to tgt-admin, and instead relies in tgt's configuration being set to find those config files in the appropriate place (nova's volumes directory). We've been shipping a file in /etc/tgt/nova_tgt to specify this directory and import all configs there, but it appears that it is not actually picking them up. With the --conf flag now removed, volume creation fails with tracebacks such as:

2012-10-02 15:23:07 CRITICAL nova [-] Resource could not be found.
2012-10-02 15:23:07 TRACE nova Traceback (most recent call last):
2012-10-02 15:23:07 TRACE nova File "/usr/bin/nova-volume", line 48, in <module>
2012-10-02 15:23:07 TRACE nova service.wait()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 659, in wait
2012-10-02 15:23:07 TRACE nova _launcher.wait()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 192, in wait
2012-10-02 15:23:07 TRACE nova super(ServiceLauncher, self).wait()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 162, in wait
2012-10-02 15:23:07 TRACE nova service.wait()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line 166, in wait
2012-10-02 15:23:07 TRACE nova return self._exit_event.wait()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/eventlet/event.py", line 116, in wait
2012-10-02 15:23:07 TRACE nova return hubs.get_hub().switch()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 177, in switch
2012-10-02 15:23:07 TRACE nova return self.greenlet.switch()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py", line 192, in main
2012-10-02 15:23:07 TRACE nova result = function(*args, **kwargs)
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 132, in run_server
2012-10-02 15:23:07 TRACE nova server.start()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/service.py", line 398, in start
2012-10-02 15:23:07 TRACE nova self.manager.init_host()
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/volume/manager.py", line 105, in init_host
2012-10-02 15:23:07 TRACE nova self.driver.ensure_export(ctxt, volume)
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/volume/driver.py", line 337, in ensure_export
2012-10-02 15:23:07 TRACE nova check_exit_code=False)
2012-10-02 15:23:07 TRACE nova File "/usr/lib/python2.7/dist-packages/nova/volume/iscsi.py", line 148, in create_iscsi_target
2012-10-02 15:23:07 TRACE nova raise exception.NotFound()
2012-10-02 15:23:07 TRACE nova NotFound: Resource could not be found.
2012-10-02 15:23:07 TRACE nova