8136930: Simplify use of module-system options by custom launchers
Reviewed-by: alanb, ksrini, henryjen, sundar

8154956: Module system implementation refresh (4/2016)
Reviewed-by: alanb, mchung, chegar, redestad
Contributed-by: alan.bateman@oracle.com, mandy.chung@oracle.com, erik.joelsson@oracle.com, chris.hegarty@oracle.com, peter.levart@gmail.com, sundararajan.athijegannathan@oracle.com

8028215: ORB.init fails with SecurityException if properties select the JDK default ORB
Summary: check for default ORBImpl and ORBSingleton set via properties or System properties
Reviewed-by: alanb, coffeys, mchung