Updated mediawiki/extensions
Project: mediawiki/extensions/Translate  47927c87f1c34ea4fc870ff107c1c476eb73139e

Update createMessageIndex.php to use Maintenance class

Also removed 2 STDOUT calls from MessageIndex.php.

Change-Id: Ic366f29ef1a8444ad952e6f82b3f8d1c308f4351