refactoring getter/setters for package action.admin.cluster.node.restart #2657
refactoring getter/setters for package action.admin.cluster.node.shutdown #2657
refactoring getter/setters for package action.admin.cluster.node.stats #2657
refactoring getter/setters for package action.admin.cluster.reroute #2657
refactoring getter/setters for package action.admin.cluster.settings #2657