update and enable pushQueryString (#21763)

Author: shingwaichan

main/appserver/tests/appserv-tests/devtests/web/build.xml

@@ -352,6 +352,7 @@
         <ant dir="servlet-4.0/pushStatic" target="all"/>
         <ant dir="servlet-4.0/pushCacheable" target="all"/>
         <ant dir="servlet-4.0/pushAuthorization" target="all"/>
+        <ant dir="servlet-4.0/pushQueryString" target="all"/>
     </target>
 
     <target name="web-container" depends="init-report">

main/appserver/tests/appserv-tests/devtests/web/servlet-4.0/pushQueryString/servlet/test/TestServlet.java

@@ -66,7 +66,7 @@ protected void doGet(HttpServletRequest req, HttpServletResponse res)
             throws IOException, ServletException {
         HttpSession session = req.getSession(true);
         session.putValue("info", "...");
-        PushBuilder pushBuilder = req.getPushBuilder().
+        PushBuilder pushBuilder = req.newPushBuilder().
             addHeader("test", "gf2").
             setHeader("test", "gf").
             addHeader("cookie", "JSESSIONID=" + session.getId()).