NO-JIRA: Fix inconsistent format of entity identifiers for router nodes.

Entity identities should be of the form <short-type-name>/<identifier>
routerNode entities were getting identifiers of the form "router.node:5"
Fixed this to be "router.node/5"

git-svn-id: https://svn.apache.org/repos/asf/qpid/dispatch/trunk@1645680 13f79535-47bb-0310-9956-ffa450edef68