* This must be invoked after virtualServer is set.
*/
private HttpServletHelper getConfigHelper(final ServletContext servletContext) {
Map map = new HashMap();
map.put(HttpServletConstants.WEB_BUNDLE, webDesc);
return new HttpServletHelper(getAppContextID(servletContext),
map, null, // null handler
_realmName, isSystemApp, defaultSystemProviderID);
}