Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  e07807794e2d7f236fa3e2d989279944ec2af7e5

QA: refactor create_account_failure test

* remove unnecessary do() block
* put "should" in the Then step

Change-Id: Ideaca751babff816f6563e3d22b42b82b6d211b3