[JBMAR-215] Java 9: Eliminate uses of reflection setAccessible()

[dmlloyd]

@dmlloyd opened JBMAR-215 and commented

As of Java 9, setAccessible() is effectively discontinued for portable code. Switch to Unsafe and ReflectionFactory.

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Issue Links:

• JBEAP-14604 (7.1.z) IllegalStateException: Constructor is unexpectedly inaccessible
  ("causes")
• ISPN-14826 NoClassDefFoundError: Could not initialize class org.jboss.marshalling.river.ClassDescriptors with jdk 17
  ("is depended on by")
• JBMAR-216 JDK 10 - reflection fields are no longer found
  ("incorporates")
• JBMAR-214 Java 9: Illegal reflective access to create OptionalDataException
  ("incorporates")