NO-JIRA: HA minor cleanup of  disconnect logic.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1519738 13f79535-47bb-0310-9956-ffa450edef68
NO-JIRA: Remove obsolete qpid-cluster and qpid-cluster-store tools.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1519739 13f79535-47bb-0310-9956-ffa450edef68