[Hawkular-dev] nest circular dep

Well, I found the nest dependency circularity that I was sure was around :) hawkular-agent has itests that builds a distro using nest. But you can't get the nest until you build kettle. And you can't build kettle until you build the agent. And 'round and 'round we go. We need to pull the nest out of kettle and put it somewhere else. For now, I'm just going to have a dependency on an older bus version to pick up the nest.