8044638: Tidy up Nashorn codebase for code standardsReviewed-by: lagergren, sundar
8026701: Array.prototype.splice is slow on dense arraysReviewed-by: lagergren, sundar, jlaskey
8012291: NativeArray is inconsistent in using long for length and index in some places and int for the same in other placesReviewed-by: lagergren, jlaskey