Comment 46 for bug 1251590

Just noticed that the unit tests for the havana patch aren't working for me. (Probably my setup).

./run_tests.sh test_create_images_and_backing_ephemeral_gets_created

...

FAIL: nova.tests.virt.libvirt.test_libvirt.LibvirtConnTestCase.test_create_images_and_backing_ephemeral_gets_created

Traceback (most recent call last):
  File "/home/gm/devel/github/openstack/nova/nova/tests/virt/libvirt/test_libvirt.py", line 3066, in test_create_images_and_backing_ephemeral_gets_created
    CONF.image_cache_subdirectory_name)
  File "/home/gm/devel/github/openstack/nova/.venv/lib/python2.7/site-packages/oslo/config/cfg.py", line 1648, in __getattr__
    raise NoSuchOptError(name)
NoSuchOptError: no such option: image_cache_subdirectory_name