Add new AvailableContainersScalingEnricher
Fix build errors
Add enricher and policy to infrastructure for headroom
Fix NPE when attributes not available
Propagate pool status sensors to host cluster from infrastructure
Fix workrate calculations for autoscaler policy
Updated Docker Cloud application blueprints and added headroom configuration
Merge pull request #47 from brooklyncentral/available-containers-enricher

Available containers enricher