8333804: java/net/httpclient/ForbiddenHeadTest.java threw an exception with 0 failures

Backport-of: ec1664e8c9413890ce2dae5c2dbbce3449d67882

Author: Andrew Lu

test/jdk/java/net/httpclient/ForbiddenHeadTest.java

@@ -381,7 +381,7 @@ public void setup() throws Exception {
     public void teardown() throws Exception {
         authClient = noAuthClient = null;
         Thread.sleep(100);
-        AssertionError fail = TRACKER.check(500);
+        AssertionError fail = TRACKER.check(1500);
         try {
             proxy.stop();
             authproxy.stop();