8044638: Tidy up Nashorn codebase for code standards
Reviewed-by: lagergren, sundar

8028573: Line number nodes were off for while nodes and do while nodes - the line number of a loop node should be treated as the location of the test expression
Reviewed-by: attila, hannesw

8028434: Line number nodes were off for while nodes and do while nodes - the line number of a loop node should be treated as the location of the test expression
Reviewed-by: jlaskey, sundar