Updated mediawiki/extensions
Project: mediawiki/extensions/SemanticSignup  ddc6da925d5bf2be2d1c834ddd8e84c85beea863

Fix compatibility with SemanticForms versions > 2

* Increased MW supported version to 1.17 (ResourceLoader is neeeded by SF)
* Also adds id="sfForm" to the form generated so it works properly with
  SemanticForms
* Remove invalid scripts added from older SF versions, SF seems to load them
  on its own now.

Change-Id: I72e4f17337e77da0309d4f1a9fb79577790d1a30