[classlib][beans] Current java6 bean implementation does not persist some class properly [was: There are some JDK 6 feature not implemented]

[Spark Shen]

I find beans.XMLEncoder does not persist java.lang.reflect.Field properly.
And I suspect there are more classes not properly handled.

I have reported a JIRA:
https://issues.apache.org/jira/browse/HARMONY-4321

If no objection, I will go to implement those missing persistence
functionality.

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Spark Shen
China Software Development Lab, IBM