RFR of JDK-8171142: jdk_rmi registry test fail to clean up on failure

[Hamlin Li]

Would you please review the below patch?

bug: https://bugs.openjdk.java.net/browse/JDK-8171142

webrev: http://cr.openjdk.java.net/~mli/8171142/webrev.00/


Thank you

-Hamlin