Ispn 2439

https://issues.jboss.org/browse/ISPN-2439
- there's also another fix but the one described in 2439: the intermediate cache is not started on all nodes when the map/reduce task starts using it and this causes inconsistencies (e.g. elements to be counted twice, due to main owner changing). I've added logic to make sure the intimidate cache is properly started on all nodes before using it.