Summary: When storing Properties to XML only locally defined properties must be saved.
Reviewed-by: psandoz, mchung, alanb

Reviewed-by: chegar, ksrini

8000685: (props) Properties.storeToXML/loadFromXML should only require UTF-8 and UTF-16 to be supported
Reviewed-by: mchung, chegar

Reviewed-by: mchung, forax

Reviewed-by: alanb, mchung

7090178: Move java.util.XMLUtils to another package to avoid split package
Reviewed-by: alanb, sherman

Reviewed-by: xdono

Reviewed-by: alanb, sherman, darcy, igor

Reviewed-by: darcy, weijun