It is not a singleton anymore. Instead it is an object with a registry
backend. The default registry backend is provided, which is equivalent
to what used to be before. Custom backend can be provided for testing
purposes.
The registry also supports batch operations to remove and add handlers
as an atomic step.
* Remove individually vendored k8s.io/kubernetes/pkg/<foo>
* Vendor the whole of vendor/k8s.io/kubernetes/pkg
* Add k8s pod log control
* Tag pods with host id and include them in the host topology as children.
* adding a basic test for kubernetes.Reporter.GetLogs
