Add a .testr.conf configuration and ignore .testrepository.
Add a .testr.conf configuration and ignore .testrepository.

Change-Id: I182d8b5567732ecf3da69f580c3e4b6d6438ab6b

openstack/dib-utils,citrix-openstack-build/dib-utils,openstack/dib-utils,citrix-openstack-build/dib-utils