no-jira; close the blue box of the death after suspend a QTI 2.1 test

src/test/java/org/olat/selenium/page/qti/QTI21Page.java

@@ -246,6 +246,7 @@ public class QTI21Page {
 		browser.findElement(suspendBy).click();
 		OOGraphene.waitBusy(browser);
 		confirm();
+		OOGraphene.waitAndCloseBlueMessageWindow(browser);
 		return this;
 	}