Would you please review the below patch?
bug: https://bugs.openjdk.java.net/browse/JDK-7195382
webrev: http://cr.openjdk.java.net/~mli/7195382/webrev.00/
what's changed?
* Use createRMIDOnEphemeralPort to avoid "port in use" exception.
* Because createRMIDOnEphemeralPort will choose different ports for rmid
for multiple runs, it will fail subsequent ActivationGroup except of
first run, so have to run 4 test cases in different JVM by putting them
in rather in separate "@run main/othervm".
* Put rmid.cleanup() in finally block to avoid orphan process bug.
* delete dead code.
Thank you
-Hamlin
