8181087: Module system implementation refresh (6/2017)
Reviewed-by: plevart, mchung
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com

8177530: Module system implementation refresh (4/2017)
Reviewed-by: mchung, alanb
Contributed-by: alan.bateman@oracle.com, mandy.chung@oracle.com