Updated mediawiki/extensions
Project: mediawiki/extensions/Translate  e6fca7dcb0a0140baf38323524118449f33bd35a

Implement tests for empty sandbox

Also change the testing params for URLs so that
the sandbox is always emptied before adding new
test users.

Change-Id: I4a5342daad96fd60fa5c29c5803ffa15c8b29142