JIRA:QPID-5820 Added some defensive code to qmf-ui.js to protect against the case when null binding arguments get returned. Fixed bug in broker-core BindingImpl.java whereby the binding arguments were not being set on construction which caused getArguments to always return null

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1608025 13f79535-47bb-0310-9956-ffa450edef68