RFR: 8297289: problem list runtime/vthread/RedefineClass.java and TestObjectAllocationSampleEvent.java

[Serguei Spitsyn]

A trivial fix to ProblemList two tests:
  runtime/vthread/RedefineClass.java
  runtime/vthread/TestObjectAllocationSampleEvent.java

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Commit messages:
 - 8297289: problem list runtime/vthread/RedefineClass.java and TestObjectAllocationSampleEvent.java

Changes: https://git.openjdk.org/jdk/pull/11245/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11245&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297289
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11245.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11245/head:pull/11245

PR: https://git.openjdk.org/jdk/pull/11245