8132092: Nashorn copyright has to be updated
Reviewed-by: jlaskey, hannesw, mhaupt

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

8035820: Optimistic recompilation
Reviewed-by: hannesw, jlaskey, sundar
Contributed-by: attila.szegedi@oracle.com, marcus.lagergren@oracle.com

8033763: Add tests to assert map identity of certain objects
Reviewed-by: hannesw, lagergren