QPID-4677: Rename broker and virtual host attribute constants to distiguish the global default settings for queues, connections and virtual hosts from own attributes

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1462550 13f79535-47bb-0310-9956-ffa450edef68
QPID-4678: Add ACL checks to restrict the operations to change broker level configuration through the management interfaces

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1462551 13f79535-47bb-0310-9956-ffa450edef68