[7u-dev] Request for approval for 8023529

[shanliang]

This is a simple export/import backport for
  8023529: OpenMBeanInfoSupport.equals/hashCode throw NPE
bug: https://bugs.openjdk.java.net/browse/JDK-8023529
jdk 8 changeset: http://hg.openjdk.java.net/jdk8/tl/jdk/rev/e407df8093dc
jdk 8 review: 
http://mail.openjdk.java.net/pipermail/serviceability-dev/2013-September/011535.html

Thanks,
Shanliang