8173888: Test for JDK-8169481 causes stack overflows in parser tests
Reviewed-by: jlaskey, sundar

8173851: JDK-8008448.js fails to parse test for JDK-8169481
Reviewed-by: jlaskey

8027933: Add --const-as-var option
Reviewed-by: jlaskey, hannesw

8009757: Package access clean up and refactoring
Reviewed-by: jlaskey, lagergren, attila

8008448: Add coverage test for jdk.nashorn.internal.ir.debug.JSONWriter
Reviewed-by: jlaskey, attila