image/v2/test_images.py file,there is no test_index_no_params test case

[xuchao]

1、Run test（test_index_no_params）
# ./refstack-client test -c ~/refstack-client/.tempest/etc/tempest.conf -v -- tempest.api.image.v2.test_images.ListImagesTest.test_index_no_params

2、There is no test_index_no_params in this file for this test case
refstack-client/.tempest/tempest/api/image/v2/test_images.py

3、Note：
1）Refstack install
By default, Tempest will be installed from commit 8d468c8332b1d0d7176c285de4cedfa589a54a23 (May 7, 2016).
https://github.com/openstack/refstack-client

2）test list
https://github.com/openstack/defcore/blob/master/2016.01.json file have the test case

[Catherine Diep (cdiep)]

This bug is a duplicate of https://bugs.launchpad.net/refstack/+bug/1590405. Let's just use https://bugs.launchpad.net/refstack/+bug/1590405.