Merge "Behat Test: Resize imag missing string Bug 1446488"

test/behat/features/admin/resize_images_string.feature

+@javascript @core @core_administration
+Feature: Missing language string when resizing images in plugin administration
+ In order to know what the button does I need to see lang string
+ As as admin
+ So I know what I'm turning on or off.
+
+Scenario: Checking the language string is visible (Bug 1446488)
+ Given I log in as "admin" with password "Password1"
+ When I go to "admin/extensions/pluginconfig.php?plugintype=artefact&pluginname=file&type=file"
+ And I follow "Resize images on upload"
+ Then I should see "Automatically resize large images on upload"
+