https://issues.jboss.org/browse/FABRIC-674 - unignore test and close discovery agent when done
https://issues.jboss.org/browse/FABRIC-674 - stop containers instead fo destroying them
FABRIC-674 - use ManagedGroupFactoryBuilder for FabricDiscoveryAgent in attepmt to handle zk reconnects better
FABRIC-674 - add DelegateZooKeeperMultiGroup
FABRIC-674 - use managed factory curator for zk substition in discovery agent