Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  9c38b75f30bf6ed2b1df3e88591055544b177b19

QA: WIP update tests for RSpec3 syntax etc.

Add back a sleep to make the test pass

* make a Then statement with no assertion into a When
* remove Then statements assertions from Given steps
* prefer single quotes per rubocop
* use strings instead of regexes where appropriate for match operator
* use appropriate wait_until syntax
* remove redundant steps that call a single other step
* sort invisible selection criteria from steps to Feature input
* add when_present polling because test is now much faster

Change-Id: I24435362836945833942e87d7caee49c9b34368d