8176176: fix @modules in jdk_svc tests
Reviewed-by: shurailine, sspitsyn

8174915: Improve error handing for Jdp tests under sun/management/jdp
Summary: Added checks for abnormal exits of spawn process by test cases
Reviewed-by: dholmes, dfuchs, sspitsyn
Contributed-by: amit.sapre@oracle.com

8174196: sun/management/jdp tests are not running properly
Reviewed-by: egahlin, dfuchs
Contributed-by: amit.sapre@oracle.com

8173393: Module system implementation refresh (2/2017)
Reviewed-by: dfuchs, psandoz, mchung, alanb
Contributed-by: alan.bateman@oracle.com, mandy.chung@oracle.com, claes.redestad@oracle.com, alex.buckley@oracle.com, mark.reinhold@oracle.com, john.r.rose@oracle.com

8167337: When jmxremote.port=0, JDP broadcasts "0" instead of assigned port
Summary: Fetched the correct jmx service url for jdp to broadcast it.
Reviewed-by: dsamersoff, rriggs
Contributed-by: amit.sapre@oracle.com