Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  b9357309282e4afd72ae3143646f961992c04019

Deprecated wfMsg, wfMsgForContent, wfMsgExt

using wfMessage like described on
https://www.mediawiki.org/wiki/Manual:Messages_API
related to https://gerrit.wikimedia.org/r/#/c/146441/

Change-Id: I3decf5990b9ee5755f9430d337d8ef533cd28e8d