Add missing extensions

Our configuration references the Cite, Gadgets, Nuke,
ParserFunctions, Renameuser, SpamBlacklist, SyntaxHighlight_GeSHi,
and WikiEditor extensions. These are not shipped in the MW source
tree, so we have to add them to the extensions list in the manifest
to make sure they get downloaded.

Change-Id: I27ab06adcd1bee69bcc196a44dd401be6cff574f

manifests/init.pp

@@ -90,19 +90,28 @@ class mediawiki(
         'Babel',
         'CategoryTree',
         'CirrusSearch',
+        'Cite',
         'CodeEditor',
         'Collection',
+        'ConfirmEdit',
         'Echo',
         'Elastica',
+        'Gadgets',
         'Mantle',
         'MobileFrontend',
+        'Nuke',
         'OpenID',
+        'ParserFunctions',
+        'Renameuser',
         'ReplaceText',
         'Scribunto',
         'SmiteSpam',
+        'SpamBlacklist',
         'SubPageList3',
+        'SyntaxHighlight_GeSHi',
         'Translate',
         'UniversalLanguageSelector',
+        'WikiEditor',
         'cldr',
         'googleAnalytics',
       ]: