Updated openstack/openstack
Project: openstack/glance  a9e1f7d1e5a95f1e42f0011e1330fe03a3bcbfb9
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Add tests for glance/image_cache/client.py

- add test cases for all CacheClient's functions in
CacheClientTestCase class
- add test cases for get_client function in
GetClientTestCase class

Change-Id: Idff48cbc1cf8c1f33125c258e97a4587bb1123bd