RFR (trivial) 8209564: runtime/appcds/CDSandJFR.java timeout on tier6 on sparc

[Jiangli Zhou]

Please review this trivial change for setting a timeout=500 in 
CDSandJFR.java.

http://cr.openjdk.java.net/~jiangli/8209564/webrev.00/

bug: https://bugs.openjdk.java.net/browse/JDK-8209564

Tested with mach5 runs.

Thanks,

Jiangli