RFR, fix for 8027914, compact1/2 VM exits silently with -Dcom.sun.management argument

[bill . pittore]

If you are running a non-minimal VM build with compact 1 or 2 JRE and 
you pass in -Dcom.sun.management argument, VM will exit silently with 
exit code 1. Fix adds an error check when attempting to load the class 
sun.management.Agent (missing from compact 1 and 2) and will print a 
message before exiting.

http://cr.openjdk.java.net/~bpittore/8027914/webrev.00/
thanks,
bill