Unify the location of the default flagfile.

Not all workers called utils.default_flagfile, and nova-manage
explicitly said to use the one in /etc/nova/nova-manage.conf.

This made development awkward since everything but nova-manage would use
defaults for everything, but nova-manage would use whatever config was
in /etc/nova/nova-manage.conf which was likely put there by a package of
some sort.

bin/nova-compute

@@ -34,10 +34,12 @@ if os.path.exists(os.path.join(possible_topdir, 'nova', '__init__.py')):
 
 from nova import service
 from nova import twistd
+from nova import utils
 
 
 if __name__ == '__main__':
     twistd.serve(__file__)
 
 if __name__ == '__builtin__':
+    utils.default_flagfile()
     application = service.Service.create()  # pylint: disable=C0103