QPID-4390: Change json configuration store to identify configuration entry type based on relationship name

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/java-broker-config-qpid-4390@1438619 13f79535-47bb-0310-9956-ffa450edef68
QPID-4390: Fix BrokerLoggingTest tests

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/java-broker-config-qpid-4390@1438620 13f79535-47bb-0310-9956-ffa450edef68
QPID-4390: Remove unused classes

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/java-broker-config-qpid-4390@1438621 13f79535-47bb-0310-9956-ffa450edef68
QPID-4390: Use json store as a default store

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/java-broker-config-qpid-4390@1438622 13f79535-47bb-0310-9956-ffa450edef68