Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  4f7d4c3cac08904efaacce0bc140ae858b4e9cfb

fixed not showing avatars

* uploaded avatars were ignored due to the renaming of the hook from adapter to core
* changed userimage setting to provided method

Change-Id: I5b9a9094d33dd28ebd4060af19f706547d0725ef