Add resource clean for tests
Add resource clean for tests

In test_images_member.py, there are three tests create image member,
but they does not clean up at the end. Add clean up for them.

Change-Id: Ifbabbb1886f1d298e05778850a171ede603fb9be

masayukig/tempest,vedujoshi/tempest,Juniper/tempest,cisco-openstack/tempest,cisco-openstack/tempest,openstack/tempest,vedujoshi/tempest,masayukig/tempest,openstack/tempest,Juniper/tempest