In unit tests, test setup() method not called for subdirectory tests

[Lorin Hochstein]

For tests that are in subdirectories of the tests directory, it appears that the setup() method in nova/tests/__init__.py does not get called.

A simple way to replicate this bug is to remove the clean.sqlite file and then run a test in a subdirectory:

$ rm clean.sqlite
$/run_tests.sh api.test_wsgi

Test
    test_debug ERROR
    test_router ERROR

======================================================================
ERROR: test_debug (api.test_wsgi.Test)
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Traceback (most recent call last):
  File "/Users/lorin/nova/trunk/nova/test.py", line 74, in setUp
    os.path.join(FLAGS.state_path, FLAGS.sqlite_db))
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/shutil.py", line 52, in copyfile
    fsrc = open(src, 'rb')
IOError: [Errno 2] No such file or directory: '/Users/lorin/nova/trunk/nova/../clean.sqlite'

======================================================================
ERROR: test_router (api.test_wsgi.Test)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/lorin/nova/trunk/nova/test.py", line 74, in setUp
    os.path.join(FLAGS.state_path, FLAGS.sqlite_db))
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/shutil.py", line 52, in copyfile
    fsrc = open(src, 'rb')
IOError: [Errno 2] No such file or directory: '/Users/lorin/nova/trunk/nova/../clean.sqlite'

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