8060204: Fix warnings in Joni and tests
Reviewed-by: hannesw, sundar, attila

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

8036986: Test should check that correctly type is returned running with optimistic. If optimistic assumption was wrong we should get the right one.
Summary: This uses the inspection framework for generated code to ensure optimisim.
Reviewed-by: attila, lagergren
Contributed-by: matherey.nunez@oracle.com