RFR: 8291508: Fix some tests with "requires vm.continuations"

[Ao Qi]

`vmTestbase/nsk/jvmti/GetThreadInfo/thrinfo001/TestDescription.java`, `vmTestbase/nsk/jvmti/RedefineClasses/StressRedefineVirtual/StressRedefineVirtual.java`, `java/beans/XMLDecoder/8028054/TestConstructorFinder.java` and `java/beans/XMLDecoder/8028054/TestMethodFinder.java` are added or modified by [JDK-8284161](https://bugs.openjdk.org/browse/JDK-8284161), and they are failed if Loom is not supported. Also, `vmTestbase/nsk/jvmti/GetThreadInfo/thrinfo001/TestDescription.java` and `vmTestbase/nsk/jvmti/RedefineClasses/StressRedefineVirtual/StressRedefineVirtual.java` need "requires vm.jvmti".

The issue could be reproduced by zero.

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Commit messages:
 - 8291508: Fix some tests with "requires vm.continuations"

Changes: https://git.openjdk.org/jdk/pull/9677/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9677&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8291508
  Stats: 4 lines in 4 files changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/9677.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9677/head:pull/9677

PR: https://git.openjdk.org/jdk/pull/9677