8209150: [TESTBUG] Add logging to verify JDK-8197901 to a different test

[Leonid Mesnik]

Hi

Could you please review regression test for 8197901. 
I verified that test reproduce crash from  JDK-8197901 <https://bugs.openjdk.java.net/browse/JDK-8197901> if fix is not applied. Also this test is regression test for bug JDK-8209758 <https://bugs.openjdk.java.net/browse/JDK-8209758> which I found using it.

I was unable to create simpler version which reproduce bug 8197901 since there is no good way to control when Klass:external_name is invoked while java_mirror is not correct.

webrev: http://cr.openjdk.java.net/~lmesnik/8209150/webrev.00/ <http://cr.openjdk.java.net/~lmesnik/8209150/webrev.00/>
bug: https://bugs.openjdk.java.net/browse/JDK-8209150 <https://bugs.openjdk.java.net/browse/JDK-8209150>

Leonid
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