Imports of package validation

PathSynopsis
k8s.io/apimachinery/pkg/util/validation/field
k8s.io/kubernetes/pkg/apis/core/validationPackage validation has functions for validating the correctness of api objects and explaining what is wrong with them when they aren't valid.
k8s.io/kubernetes/pkg/apis/scheduling
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.