jdk/crac/RemoteJmxTest sometimes fails:

```
java.lang.NullPointerException: Cannot invoke "String.contains(java.lang.CharSequence)" because "<local3>" is null
at RemoteJmxTest.waitForString(RemoteJmxTest.java:99)
at RemoteJmxTest.test(RemoteJmxTest.java:86)
at jdk.test.lib.crac.CracTest.run(CracTest.java:163)
at jdk.test.lib.crac.CracTest.main(CracTest.java:90)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:335)
at java.base/java.lang.Thread.run(Thread.java:1474)
```

See https://github.com/wkia/crac/actions/runs/18099406212/job/51500424800