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

[sendaoYan]

Hi all, The testcase sun/management/jmxremote/startstop/JMXStartStopTest.java compile error after JDK-8334415. This PR fix the testcase bug, the change has been verified, no risk.

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Progress

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Issue

• JDK-8335851: [8u] Test JMXStartStopTest.java fails after JDK-8334415 (Bug - P4 - Requested)

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$ git fetch https://git.openjdk.org/jdk8u-dev.git pull/541/head:pull/541
$ git checkout pull/541

Update a local copy of the PR:
$ git checkout pull/541
$ git pull https://git.openjdk.org/jdk8u-dev.git pull/541/head

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$ git pr checkout 541

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https://git.openjdk.org/jdk8u-dev/pull/541.diff

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