tests: run nosetests in cloudinit/ directory, fix py26 fallout.

When we moved some tests to live under cloudinit/ we inadvertantly
failed to change all things that would run nose to include that
directory.

This changes all the 'nose' invocations to consistently run with
tests/unittests and cloudinit/.

Also, it works around, more correctly this time, a python2.6-ism with
the following code:
   with assertRaises(SystemExit) as cm:
      sys.exit(2)

1 files changed, 7 insertions, 5 deletions

diff --git a/tests/unittests/test_handler/test_schema.py b/tests/unittests/test_handler/test_schema.py
index 648573f6..df67a0e0 100644
--- a/tests/unittests/test_handler/test_schema.py
+++ b/tests/unittests/test_handler/test_schema.py
@@ -336,11 +336,13 @@ class MainTest(CiTestCase):
 
     def test_main_missing_args(self):
         """Main exits non-zero and reports an error on missing parameters."""
-        with mock.patch('sys.argv', ['mycmd']):
-            with mock.patch('sys.stderr', new_callable=StringIO) as m_stderr:
-                with self.assertRaises(SystemExit) as context_manager:
-                    main()
-        self.assertEqual('1', str(context_manager.exception))
+        with mock.patch('sys.exit', side_effect=self.sys_exit):
+            with mock.patch('sys.argv', ['mycmd']):
+                with mock.patch('sys.stderr', new_callable=StringIO) as \
+                        m_stderr:
+                    with self.assertRaises(SystemExit) as context_manager:
+                        main()
+        self.assertEqual(1, context_manager.exception.code)
         self.assertEqual(
             'Expected either --config-file argument or --doc\n',
             m_stderr.getvalue())