BAC-177: use datamart in RenameUserHelper
BAC-177: use rollup_edit_events in UserRollbackTask.class.php
PLA-332 add AbTest.js to Search
PLA-342 adding language code to search config, change in building query on interwiki search so it uses config for getting that
PLA-341 adding lang param support to config
PLA-332 preserve ABTest.* parameters in search
PLA-341 filter out exact match that do not meet language in param
PLA-341 code cleaning
PLA-308 added and changed tests, small changes for cross wiki documentation
PLA-334 introduce scheme for injecting query fieds (and whatever else) using plugin test profiles
PLA-334 fixed broken unit tests -- now to write new ones
PLA-334 added some tests for test group stuff
PLA-334 added test for bas profile
paid off some technical debt w.r.t. config unit testing
PLA-341 adding covers param to unit test
PLA-342 moving check if lang is correct to config, added acquiring wiki language
PLA-342 get lang code from different location
PLA-342
PLA-342 make lang parameter required
PLA-342 doc change