RFR(S): 8146786: [TESTBUG] straighten out testability for several issues

[Michael Haupt]

Dear all,

please review this fix.
Bug: https://bugs.openjdk.java.net/browse/JDK-8146786
Webrev: http://cr.openjdk.java.net/~mhaupt/8146786/webrev.00/

The fix adds some missing @bug annotations in tests and contributes two files that were accidentally not pushed earlier.

Thanks,

Michael

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