Code review comment for lp:~salvatore-orlando/nova/bug723301

No setting back to needs reviews though, as I get the following exception while running tests:

======================================================================
ERROR: <nose.suite.ContextSuite context=nova.tests>
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Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/nose/suite.py", line 183, in run
    self.setUp()
  File "/usr/lib/pymodules/python2.6/nose/suite.py", line 264, in setUp
    self.setupContext(ancestor)
  File "/usr/lib/pymodules/python2.6/nose/suite.py", line 287, in setupContext
    try_run(context, names)
  File "/usr/lib/pymodules/python2.6/nose/util.py", line 487, in try_run
    return func()
  File "/home/salvatore/workspace/Openstack-bug723301/nova/tests/__init__.py", line 73, in setup
    cleandb = os.path.join(FLAGS.state_path, FLAGS.sqlite_clean_db)
  File "/home/salvatore/workspace/Openstack-bug723301/nova/flags.py", line 144, in __getattr__
    val = gflags.FlagValues.__getattr__(self, name)
  File "/usr/lib/pymodules/python2.6/gflags.py", line 810, in __getattr__
    raise AttributeError(name)
AttributeError: sqlite_clean_db

It is the first time I get it, I don't think it depends on my code, but I prefer to fix it before proposing again for merge.