RFR: JDK-8216558: Lookup.unreflectSetter(Field) fails to throw IllegalAccessException for final fields

[Adam Farley8]

Hi All,

I posit that you shouldn't be able to change the contents of a a final 
field. 

However, if you use Field.setAccessible(true) before calling 
Lookup.unreflectSetter(Field), then you can get a MethodHandle that allows 
you to set the (reflected) value of a static final field.

This seems wrong to me, so here's a change to fix it.

webrev: http://cr.openjdk.java.net/~afarley/8216558/webrev/
bug: https://bugs.openjdk.java.net/browse/JDK-8216558

Opinions invited. 

Best Regards

Adam Farley 
IBM Runtimes

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