RFR: 8291508: Fix some tests with "requires vm.continuations" [v2]

[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.

Ao Qi has updated the pull request incrementally with one additional commit since the last revision:

  XMLDecoder update
  
  Co-authored-by: Alan Bateman <alanb at openjdk.org>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/9677/files
  - new: https://git.openjdk.org/jdk/pull/9677/files/c16a0b87..623e3723

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9677&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9677&range=00-01

  Stats: 5 lines in 3 files changed: 1 ins; 2 del; 2 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