resolve https://issues.apache.org/activemq/browse/AMQ-2448 - failed network bridge being incorrectly recorded in a list (and leaked), issue introduced by https://issues.apache.org/activemq/browse/AMQ-2298 now resolved by reusing exsiting correctly managed list of bridges
activemq/trunk/activemq-core/src/main/java/org/apache/activemq/network/DiscoveryNetworkConnector.java