avoid mocking Configuration object
avoid mocking Configuration object

This is to avoid uncovering Configuration.

* CLOUDBLD-9030

Signed-off-by: Harsh Modi <10511c7e5917154b560827e1a03cf4f47a4f7efa@redhat.com>

projectatomic/atomic-reactor,fr34k8/atomic-reactor,projectatomic/atomic-reactor,fr34k8/atomic-reactor