Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  5abf15890e683465b80a2d619ddca0081c53b3fd

Fix URL handling for global usage list

Also add integration tests to make sure URL generation works OK

Bug: 63908
Bug: 64910
Bug: 66147
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/570
Change-Id: I448f42e294102a633f74c305dd0a226e7dbe955d