Merge branch '5.4' into 6.0

* 5.4:
  do not mock event classes

Author: xabbuh

Tests/EventListener/SessionListenerTest.php

@@ -82,9 +82,7 @@ public function testSessionUsesFactory()
         $request = new Request();
         $listener = new SessionListener($container);
 
-        $event = $this->createMock(RequestEvent::class);
-        $event->expects($this->exactly(2))->method('isMainRequest')->willReturn(true);
-        $event->expects($this->once())->method('getRequest')->willReturn($request);
+        $event = new RequestEvent($this->createMock(HttpKernelInterface::class), $request, HttpKernelInterface::MAIN_REQUEST);
 
         $listener->onKernelRequest($event);