This PR does minimal changes to interface to allow removing all
references to prometheus from `test` directory. In future I would expect
wrapping prometheus samples to provide better abstraction. Changes:
Move generic_metrics.go to testutil/metrics.go
Remove etcd.go as it was not called
Move prometheus label consts to testutil.
- Move from the old github.com/golang/glog to k8s.io/klog
- klog as explicit InitFlags() so we add them as necessary
- we update the other repositories that we vendor that made a similar
change from glog to klog
* github.com/kubernetes/repo-infra
* k8s.io/gengo/
* k8s.io/kube-openapi/
* github.com/google/cadvisor
- Entirely remove all references to glog
- Fix some tests by explicit InitFlags in their init() methods
Change-Id: I92db545ff36fcec83afe98f550c9e630098b3135
