Request for inclusion in 0.30

Hello Justin

May I request one more defect fix in 0.30? I expect this will be the last
request from me.

QPID-6068 NPE encountered whilst editing JMX_CONNECTOR port
revs 1622677,1622747,1622768

This jira fixes an issue encountered when the user edits certain ports of
the Java Broker. There is no reasonable work around for the user.
Changes reviewed by Rob and me.

Thanks again.