Use short license name from template if we don't recognize it

We have been saying 'view terms' for every non-CC/PD image, which
is not particularly helpful.

Change-Id: Ia5fc6fb3af3802ad8a1f5188226fe4e89ab6d8d9
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/472
Merge "Use short license name from template if we don't recognize it"