8165896: Use "open" flag from JVM_DefineModule to export all module packages
Summary: Implemented VM side of open modules, which export all their packages unqualifiedly. Automatic modules and unnamed modules are treated internally as open modules.
Reviewed-by: alanb, hseigel, lfoltan

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

8173393: Module system implementation refresh (2/2017)
Reviewed-by: lfoltan, acorn, mchung
Contributed-by: alan.bateman@oracle.com, george.triantafillou@oracle.com

8165550: Add class loader names to ClassCastException message
Summary: Adds new format of class loader names to VM ClassCastException messages
Reviewed-by: dholmes, mchung, lfoltan

8142968: Module System implementation
Summary: Initial integration of JEP 200, JEP 260, JEP 261, and JEP 282
Reviewed-by: acorn, ccheung, coleenp, ctornqvi, dholmes, dsimms, gtriantafill, iklam, jiangli, mgronlun, mseledtsov, cjplummer, sspitsyn, stefank, twisti, hseigel, lfoltan, alanb, mchung, dfazunen
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, harold.seigel@oracle.com, lois.foltan@oracle.com, calvin.cheung@oracle.com, christian.tornqvist@oracle.com, erik.joelsson@oracle.com, george.triantafillou@oracle.com, igor.ignatyev@oracle.com, ioi.lam@oracle.com, james.laskey@oracle.com, jean-francois.denise@oracle.com, jiangli.zhou@oracle.com, markus.gronlund@oracle.com, serguei.spitsyn@oracle.com, staffan.larsen@oracle.com, sundararajan.athijegannathan@oracle.com