Imports of cleanup command

PathSynopsis
github.com/spf13/pflagPackage pflag is a drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags.
k8s.io/kubernetes/test/e2e
logPackage log implements a simple logging package.
osPackage os provides a platform-independent interface to operating system functionality.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.