RFR: 8146485: Add test for Unified Logging classresolve tag.

[Max Ockner]

Hello,
Please review this fix.

Bug: https://bugs.openjdk.java.net/browse/JDK-8146485
Webrev: http://cr.openjdk.java.net/~mockner/classresolvetest/

Summary: I patched my original webrev into a clean repo before 
submitting to jprt and I forgot to 'hg add' the test.  This fix contains 
the test.

Tested with: This test which is being added. No change was made to the 
source code, only a test was added.

Thanks,
Max