QPID-5935: [Java Broker] Web Management UI style refactor to remove html inline styles and standardise via css

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1615606 13f79535-47bb-0310-9956-ffa450edef68
QPID-5639, QPID-5878 : Ensure that the client gets a chance to evaluate the server proof for SCRAM-SHA* mechanisms

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1615620 13f79535-47bb-0310-9956-ffa450edef68
QPID-5928: [Java Broker] Modify web management console to hide queues and exchanges when virtualhost host is stopped or unavailable

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1615629 13f79535-47bb-0310-9956-ffa450edef68