Add tracking categories for files with attribution problems

Adds a tracking category to file pages for each of these problems:
* no description
* no author
* no source
* no license

Needs to be enabled with $wgCommonsMetadataSetTrackingCategories.

Depends on core changes I685b285fcc772382993116f7822a832eeecc0681
and I89d9ea1db3a4e6486e77eee940bd438f7753b776.

Change-Id: I43ed79b6a54cd31820ecae8139e29c5880f5dd1b
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/859
Merge "Add tracking categories for files with attribution problems"