Increase verbosity for functional tests

It's hard to tell what logging relates to which test, so increase
verbosity to make Python print test case names.

Change-Id: Ia7a532aac4e41d2a6689285425755253a2d1c852

ironic_inspector/test/functional.py

@@ -489,4 +489,4 @@ def mocked_server():
 
 if __name__ == '__main__':
     with mocked_server():
-        unittest.main()
+        unittest.main(verbosity=2)