Assuming that the screenshots directory suffix
* should match the configured UI locale instead of the work locale
* should not be empty if configuration says "Default - ..."
* actually ScreenshotTest::implSaveScreenshot() explicitly tests
(maCurrentLanguage == "en-US") and then sets the suffix to empty, so no
other locale should exhibit the same
Change-Id: Ie4561315b67c3ade20f3947772af45e471d0752f