RFR: 8291508: Fix some tests with "requires vm.continuations" [v3]

[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 tests are filed in JDK-8291640

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/9677/files
  - new: https://git.openjdk.org/jdk/pull/9677/files/623e3723..97c38a36

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9677&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9677&range=01-02

  Stats: 3 lines in 1 file changed: 0 ins; 1 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