Pass empty args to test config parser.

This fixes bug 1056420, which allows users to pass nosetests options
through run_tests.sh again.

Change-Id: I03e84488a24e2552b61aa0cab842d8325e8e856f

glance/tests/unit/test_clients.py

@@ -34,7 +34,7 @@ UUID1 = _gen_uuid()
 UUID2 = _gen_uuid()
 
 #NOTE(bcwaldon): needed to init config_dir cli opt
-config.parse_args()
+config.parse_args(args=[])
 
 
 class TestRegistryClient(base.IsolatedUnitTest):

glance/tests/utils.py

@@ -57,7 +57,7 @@ class BaseTestCase(unittest.TestCase):
         #NOTE(bcwaldon): parse_args has to be called to register certain
         # command-line options - specifically we need config_dir for
         # the following policy tests
-        config.parse_args()
+        config.parse_args(args=[])
 
     def tearDown(self):
         super(BaseTestCase, self).tearDown()