8335851: [8u] Test JMXStartStopTest.java fails after JDK-8334415

Reviewed-by: serb

Author: SendaoYan

jdk/test/sun/management/jmxremote/startstop/JMXStartStopTest.java

@@ -765,7 +765,7 @@ static void test_10() throws Exception {
                 "jmxremote.ssl=false",
                 "jmxremote.port=" + pa.getPort1()
             );
-            testConnect(port1);
+            testConnect(pa.getPort1());
 
             jcmd(CMD_STOP);
             jcmd(CMD_START,