[Misc] Removed JUnit deprecations

.../org/xwiki/administration/test/ui/AdministrationTest.java

...onmanager/core/doc/objects/classes/XClassManagerTest.java

...c/test/java/org/xwiki/bridge/ActionExecutedEventTest.java

.../test/java/org/xwiki/bridge/ActionExecutingEventTest.java

...org/xwiki/rendering/internal/macro/chart/ImageIdTest.java

...c/test/java/org/xwiki/classloader/URIClassLoaderTest.java

...xwiki/component/internal/ContextComponentManagerTest.java

...component/internal/script/ComponentScriptServiceTest.java

.../xwiki/component/wiki/DefaultWikiComponentBridgeTest.java

...xwiki/component/wiki/DefaultWikiComponentBuilderTest.java

...xwiki/component/wiki/DefaultWikiComponentManagerTest.java

...figuration/internal/CompositeConfigurationSourceTest.java

...rc/test/java/org/xwiki/csrf/CSRFTokenInvalidatorTest.java

...rf/src/test/java/org/xwiki/csrf/DefaultCSRFTokenTest.java

.../xwiki/display/internal/DocumentContentDisplayerTest.java

.../org/xwiki/rendering/internal/macro/DisplayMacroTest.java

.../test/java/org/xwiki/eventstream/EventAndFactoryTest.java

...m/src/test/java/org/xwiki/eventstream/EventGroupTest.java

...java/org/xwiki/extension/xar/XarExtensionHandlerTest.java

...ernal/repository/XarInstalledExtensionRepositoryTest.java