Updated openstack/openstack
Project: openstack/python-cinderclient  9c53495d0a25d46b6c1356410846b0b44f48aa52

Don't git ignore .mailmap and .testr.conf

These should have been whitelisted in the prior
gitignore change.

Change-Id: I21dce6256991c773f7a167f8e15499763db5eb3c