migrate to 10.0.26 - revert mime time handling

Author: rbri

src/test/java/org/htmlunit/WebServerTestCase.java

@@ -91,7 +91,9 @@ protected void startWebServer(final String resourceBase) throws Exception {
 
         final ResourceHandler resourceHandler = new ResourceHandler();
         resourceHandler.setResourceBase(resourceBase);
-        resourceHandler.getMimeTypes().addMimeMapping("js", MimeType.TEXT_JAVASCRIPT);
+        final MimeTypes mimeTypes = new MimeTypes();
+        mimeTypes.addMimeMapping("js", MimeType.TEXT_JAVASCRIPT);
+        resourceHandler.setMimeTypes(mimeTypes);
 
         final HandlerList handlers = new HandlerList();
         handlers.setHandlers(new Handler[]{resourceHandler, context});