Change for QTRY_COMPARE in flaky auto test tst_QShortcut::context()

Auto test tst_QShortcut::context() is flaky where
QCOMPARE(QApplication::activeWindow(), other1->window()) is sometimes
false where it should be true.

Modify QCOMPARE for QTRY_COMPARE to give the necessary time to the XCB
thread to proceed.

Remove the flakiness when testing on OpenSuse 15.5

Change-Id: I8332329a84cb2203ffdf1ff1b952efa6f87f3aef
Reviewed-by: Axel Spoerl <[email protected]>

tests/auto/widgets/kernel/qshortcut/tst_qshortcut.cpp

@@ -1064,7 +1064,7 @@ void tst_QShortcut::context()
 
     // Focus on 'other1' edit, so Active Window context should trigger
     other1->activateWindow(); // <---
-    QCOMPARE(QApplication::activeWindow(), other1->window());
+    QTRY_COMPARE(QApplication::activeWindow(), other1->window());
     QCOMPARE(QApplication::focusWidget(), static_cast<QWidget *>(other1));
 
     currentResult = NoResult;