Use assertGreater(len(x), y) instead of assertTrue(len(x) > y)
Use assertGreater(len(x), y) instead of assertTrue(len(x) > y)

assertGreater provides a nicer error message if it fails.

Change-Id: I37da4d5cb6d41ab7fdef4900862352dbc498f433

yeming233/rally,openstack/rally,openstack/rally,yeming233/rally,openstack/rally,openstack/rally