Make unit test runner exit with proper status

Author: brianjmiller

test/main.py

@@ -79,4 +79,5 @@ def setup_tincan_path():
     test_pardir = locate_package('test')
     test_dir = os.path.join(test_pardir, 'test')
     suite = loader.discover(test_dir, pattern='*_test.py')
-    unittest.TextTestRunner(verbosity=1).run(suite)
+    ret = unittest.TextTestRunner(verbosity=1).run(suite).wasSuccessful()
+    sys.exit(ret)