Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  ceba191bd6ba5c85936ed60293bad0e1cd56a70e

Properly reset group permissions in EntityContentTest

This will (I'm 99% sure this time) fix the remaining
problems we see with travis.

Change-Id: Ic40f273332e1c1fdeffbb7bbfc4d11e77f2c0827