DAR-2923 | Disable responsive for german wikis
DAR-2923: Removed checking wgEnableWikiaPageExt and wgLanguageCode
Revert "DAR-2923: Removed checking wgEnableWikiaPageExt and wgLanguageCode"

This reverts commit 4e5cd603199c91a8253082b91bb9d91b742c3e15.
DAR-2923: Removed wgLanguageCode check from BodyController
DAR-2923: Moved setting $wgOasisResponsive to CommonExtensions.php
DAR-2923: Initialized $wgOasisResponsive in DefaultSettings.php
Merge pull request #2140 from Wikia/DAR-2923

DAR-2923 | Disable responsive for german wikis