Regression: Building from specific configurations after listing is broken

After commit b01afd4e8262e25faa6cff4adc18aff6560bfed6 it is now necessary to provide a correct product sha1 in the integration request when listing test configurations. Failing to provide the sha1 will produce an empty VM template in the TestConfiguration structure and subsequent builds using that will fail at the provisioning level.

This issue is observable on the UI level when selecting "List Configurations" in the coin web ui and then choosing a particular configuration before building it. Such builds fail.