working

App :
public class MyApplication extends WebApplication {
@Override
  protected void init()
  {
    super.init();
    getApplicationSettings().setUploadProgressUpdatesEnabled(true);

    getComponentInstantiationListeners().add(new SpringComponentInjector(this));
    Injector.get().inject(this);

    configureBootstrap();
    optimizeForWebPerformance();
  }

  private void configureBootstrap() {
    final IBootstrapSettings settings = new BootstrapSettings();
    //final ThemeProvider themeProvider = new BootswatchThemeProvider(BootswatchTheme.Flatly);
    //settings.setJsResourceFilterName("footer-container").setThemeProvider(themeProvider);
    settings.setJsResourceFilterName("footer-container");

    Bootstrap.install(this, settings);
  }


  /**
   * optimize wicket for a better web performance
   */
  private void optimizeForWebPerformance() {
    if (usesDeploymentConfig()) {
      getResourceSettings().setCachingStrategy(new FilenameWithVersionResourceCachingStrategy("-v-", new CachingResourceVersion(new Adler32ResourceVersion())));

      getResourceSettings().setJavaScriptCompressor(new GoogleClosureJavaScriptCompressor(CompilationLevel.SIMPLE_OPTIMIZATIONS));
      getResourceSettings().setCssCompressor(new YuiCssCompressor());

      getFrameworkSettings().setSerializer(new DeflatedJavaSerializer(getApplicationKey()));
    }
    else {
      getResourceSettings().setCachingStrategy(new NoOpResourceCachingStrategy());
    }

    // setHeaderResponseDecorator(new RenderJavaScriptToFooterHeaderResponseDecorator());
    getRequestCycleSettings().setRenderStrategy(IRequestCycleSettings.RenderStrategy.ONE_PASS_RENDER);
  }
}

BasePage.java :
  public BasePage(final PageParameters pps) {
    super(pps);

    add(new HtmlTag("html"));

    add(new OptimizedMobileViewportMetaTag("viewport"));
    add(new ChromeFrameMetaTag("chrome-frame"));

    add(newNavbar("navbar" , pps));
    navigation = newNavigation("navigation");
    add(navigation);

    add(new Code("code-internal"));
    // add(new HeaderResponseContainer("footer-container", "footer-container"));
  }

and remove
<wicket:container wicket:id="footer-container"/>
in BasePage.html