https://issues.jboss.org/browse/HORNETQ-1342 - check for empty id map
HORNETQ-1125:Support injection of config instances

https://issues.jboss.org/browse/HORNETQ-1125

This patch allows interceptors and connector service factory instances
to be associated with a HornetQ Configuration object.  This allows
parent server such as WildFly to instantiate and inject these objects
into the configuration.