test: last update check img

spec/system/admin/admin_manages_survey_question_with_image_spec.rb

@@ -36,7 +36,7 @@
       visit questionnaire_edit_path
       click_button "Save"
       click_button "Expand all"
-      expect(page).to have_xpath('//img[@src="http://mon_image.png"]')
+      expect(page).to have_css("img[src$='mon_image.png']")
       within "#questionnaire_question_#{question.id}-field" do
         within "#questionnaire_question_#{question.id}-description-panel-0" do
           input = page.find("#questionnaire_questions_#{question.id}_description_en")