[test][test_config] Import temp_cwd needed in tests

beat/cmdline/test/test_config.py

@@ -35,7 +35,7 @@ import nose.tools
 from nose.tools import assert_raises
 import simplejson
 
-from . import tmp_prefix
+from . import tmp_prefix, temp_cwd
 from ..scripts.beat import main
 from beat.core.test.utils import cleanup
 from .. import config