Refactor platform manager to support verticle deployments.
Add Xync platform locator.
Update cluster manager and service for direct identified deployments.
Remove the keys() command from the cluster.
Remove the keys() command from the cluster client.
Ensure all managers reference the same cluster data.
Remove keys() test.
Fix platform manager factory interface.
Add platform manager tests modelled after core Vert.x PM tests.
Fix bugs in undeployment.
Remove rogue debug statement.
Add platform manager verticle deployment tests.