XCOMMONS-3530: Listener not correctly registered while upgrading another extension

* replace junit4 leftovers

(cherry picked from commit 1addc94)

Author: tmortagne

xwiki-commons-core/xwiki-commons-component/xwiki-commons-component-default/src/test/java/org/xwiki/component/internal/QueueComponentEventManagerTest.java

@@ -31,9 +31,9 @@
 import org.xwiki.component.manager.ComponentManager;
 import org.xwiki.observation.ObservationManager;
 
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertSame;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.mock;