[7u-dev] Request for approval for 8023669

[shanliang]

This is a simple export/import backport for:
  8023669: MBean*Info.hashCode : NPE

bug: https://bugs.openjdk.java.net/browse/JDK-8023669
jdk 8 changeset: http://hg.openjdk.java.net/jdk8/tl/jdk/rev/ba0b95f310c8
jdk 8 review: 
http://mail.openjdk.java.net/pipermail/serviceability-dev/2013-August/011422.html

Thanks,
Shanliang